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+<!DOCTYPE html>
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+<html lang="en">
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+ <head>
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+ <meta charset="UTF-8" />
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+ <meta http-equiv="X-UA-Compatible" content="IE=edge" />
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0" />
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+ <title>Document</title>
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+ </head>
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+ <body>
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+ <script>
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+ //SWITCH: SIZES -----------------------------------------------------------------------
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+ function switchSizes() {
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+ let size = +prompt("enter size to covert (Russia => USA )");
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+
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+ switch (size) {
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+ case 40:
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+ alert("S");
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+ break;
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+ case 42:
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+ case 44:
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+ alert("M");
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+ break;
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+ case 46:
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+ case 48:
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+ alert("L");
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+ break;
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+ case 50:
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+ case 52:
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+ alert("XL");
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+ break;
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+ case 54:
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+ alert("XLL");
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+ break;
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+ default:
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+ alert("Incorrect size");
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+ }
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+ }
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+
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+ //SWITCH: IF -----------------------------------------------------------------------
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+ function switchIF() {
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+ let color = prompt("Введите цвет", "");
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+
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+ if (color == "red") {
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+ document.write("<div style='background-color: red;'>красный</div>");
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+ document.write("<div style='background-color: black; color: white;'>черный</div>");
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+ } else if (color == "black") {
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+ document.write("<div style='background-color: black; color: white;'>черный</div>");
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+ } else if (color == "blue") {
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+ document.write("<div style='background-color: blue;'>синий</div>");
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+ document.write("<div style='background-color: green;'>зеленый</div>");
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+ } else if (color == "green") {
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+ document.write("<div style='background-color: green;'>зеленый</div>");
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+ } else {
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+ document.write("<div style='background-color: gray;'>Я не понял</div>");
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+ }
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+ }
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+
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+ //PROMPT: OR -----------------------------------------------------------------------
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+ function promptOR() {
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+ +prompt("How old are you") || alert("error: incorrect age");
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+ }
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+
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+ //CONFIRM: OR THIS DAYS -----------------------------------------------------------------------
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+
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+ function confirmOR() {
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+ confirm("шопинг?") || alert("ты - бяка");
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+ }
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+
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+ //CONFIRM: IF THIS DAYS -----------------------------------------------------------------------
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+
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+ function confirmIF() {
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+ let isShoping = confirm("шопинг?");
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+
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+ if (isShoping === false) {
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+ alert("ты - бяка");
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+ }
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+ }
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+
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+ //TRIPLE PROMPT -----------------------------------------------------------------------
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+ function triplePrompt() {
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+ let surname = prompt("Фамилия");
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+ let name = prompt("Имя");
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+ let patronymic = prompt("Отчество");
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+
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+ alert(` ${surname} ${name} ${patronymic}`);
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+ }
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+
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+ //DEFAULT: OR -----------------------------------------------------------------------
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+
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+ function defaultOR() {
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+ let surname = prompt("Фамилия") || "Иванов";
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+ let name = prompt("Имя") || "Иван";
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+ let patronymic = prompt("Отчество") || "Иванович";
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+ alert(` ${surname} ${name} ${patronymic}`);
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+ }
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+
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+ //DEFAULT: IF -----------------------------------------------------------------------
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+
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+ function defaultIF() {
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+ let surname = prompt("Фамилия") || "Иванов";
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+ let name = prompt("Имя") || "Иван";
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+ let patronymic = prompt("Отчество") || "Иванович";
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+
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+ if (!surname) {
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+ surname = "Иванов";
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+ }
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+ if (!name) {
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+ name = "Иван";
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+ }
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+ if (!surname) {
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+ patronymic = "Иванович";
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+ }
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+
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+ alert(` ${surname} ${name} ${patronymic}`);
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+ }
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+
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+ //LOGIN AND PASSWORD -----------------------------------------------------------------------
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+
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+ function loginAndPassword() {
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+ while (true) {
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+ let login = prompt("login");
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+
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+ if (login && login === "admin") {
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+ let password = prompt("password");
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+ if (password && password === "qwerty") {
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+ alert("successfull login");
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+ break;
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+ } else {
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+ alert("password is incorrect");
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+ continue;
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+ }
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+ } else {
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+ alert("login is incorrect");
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+ continue;
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+ }
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+ }
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+ }
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+
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+ //CURRENCY CALC -----------------------------------------------------------------------
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+
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+ function currencyCalc() {
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+ let currency = prompt("Enter currency to convert(usd/eur)");
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+ let rate = 1;
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+ let amount = +prompt("Amount to convert");
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+ switch (currency) {
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+ case "usd":
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+ rate = 26.2;
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+ break;
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+ case "eur":
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+ rate = 30;
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+ break;
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+ }
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+ if (amount && amount > 0) {
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+ alert(amount / rate).toFixed(3);
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+ } else {
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+ alert("error");
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+ }
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+ }
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+
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+ //CURRENCY CALC: IMPROVED -----------------------------------------------------------------------
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+
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+ function currencyCalcImp() {
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+ let currency = prompt("Enter currency to convert(usd/eur)").toLowerCase();
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+ let rate = 1;
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+ let amount = +prompt("Amount to convert");
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+ switch (currency) {
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+ case "usd":
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+ rate = 26.2;
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+ break;
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+ case "eur":
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+ rate = 30;
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+ break;
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+ }
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+ if (amount && amount > 0) {
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+ alert(amount / rate).toFixed(3);
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+ } else {
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+ alert("error");
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+ }
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+ }
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+
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+ //CURRENCY CALC: TWO RATES -----------------------------------------------------------------------
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+
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+ function currencyCalcTwo() {
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+ let selling = confirm("Convert on selling rates?");
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+ let currency = prompt("Enter currency to convert(usd/eur)").toLowerCase();
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+ let rate = 1;
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+ let amount = +prompt("Amount to convert");
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+ switch (currency) {
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+ case "usd":
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+ rate = selling ? 26.23 : 26.14;
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+ break;
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+ case "eur":
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+ rate = selling ? 29.99 : 29.83;
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+ break;
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+ }
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+ if (amount && amount > 0) {
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+ alert(amount / rate).toFixed(3);
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+ } else {
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+ alert("error");
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+ }
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+ }
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+
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+ //CURRENCY CALC: IF -----------------------------------------------------------------------
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+
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+ function currencyCalcIF() {
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+ let selling = confirm("Convert on selling rates?");
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+ let currency = prompt("Enter currency to convert(usd/eur)").toLowerCase();
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+ let rate = 1;
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+ let amount = +prompt("Amount to convert");
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+
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+ if (selling) {
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+ if (currency === "usd") {
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+ rate = 26.23;
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+ }
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+ if (currency === "eur") {
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+ rate = 29.99;
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+ }
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+ } else {
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+ if (currency === "usd") {
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+ rate = 26.14;
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+ }
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+ if (currency === "eur") {
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+ rate = 29.83;
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+ }
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+ }
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+
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+ if (amount && amount > 0) {
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+ alert(amount / rate).toFixed(3);
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+ } else {
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+ alert("error");
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+ }
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+ }
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+
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+ //SCISSORS -----------------------------------------------------------------------
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+
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+ function scissors() {
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+ let chose = prompt("Make ur choise").toLowerCase();
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+ let aiChose = "";
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+ let random = Math.random();
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+
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+ if (random <= 0.33) {
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+ aiChose = "камень";
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+ } else if (aiChose <= 0.66) {
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+ aiChose = "ножницы";
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+ } else {
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+ aiChose = "бумага";
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+ }
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+
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+ console.log(aiChose);
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+
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+ if (chose === aiChose) {
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+ alert("ничья");
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+ } else if (
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+ (chose === "камень" && aiChose === "бумага") ||
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+ (chose === "бумага" && aiChose === "ножницы") ||
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+ (chose === "ножницы" && aiChose === "камень")
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+ ) {
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+ alert("You lose");
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+ } else {
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+ alert("You win");
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+ }
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+ }
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+
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+ //ЗАДАНИЕ НА СИНИЙ ПОЯС -----------------------------------------------------------------------
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+ function blue() {
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+ let rates = {};
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+ let currency = prompt("Enter currency to convert(usd/eur)").toLowerCase();
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+ let amount = +prompt("Amount to convert");
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+ fetch("https://open.er-api.com/v6/latest/UAH")
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+ .then((res) => res.json())
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+ .then((data) => {
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+ rates["usd"] = data.rates.USD;
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+ rates["eur"] = data.rates.EUR;
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+ })
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+ .then(() => {
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+ if (amount && amount > 0) {
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+ alert((amount * rates[currency]).toFixed(3));
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+ } else {
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+ alert("error");
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+ }
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+ });
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+ }
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+
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+ //ДОПОЛНИТЕЛЬНОЕ ЗАДАНИЕ -----------------------------------------------------------------------
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+
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+ while (true) {
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+ let task = prompt("Enter task name or leave blank to stop", "").toLowerCase();
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+ if (task) {
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+ switch (task) {
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+ case "switch: sizes":
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+ switchSizes();
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+ break;
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+ case "switch: if":
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+ switchIF();
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+ break;
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+ case "prompt: or":
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+ promptOR();
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+ break;
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+ case "confirm: or this days":
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+ confirmOR();
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+ break;
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+ case "confirm: if this days":
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+ confirmIF();
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+ break;
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+ case "triple prompt":
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+ triplePrompt();
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+ break;
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+ case "default: if":
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+ defaultIF();
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+ break;
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+ case "default: or":
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+ defaultOR();
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+ break;
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+ case "login and password":
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+ loginAndPassword();
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+ break;
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+ case "currency calc":
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+ currencyCalc();
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+ break;
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+ case "currency calc: improved":
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+ currencyCalcImp();
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+ break;
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+ case "currency calc: two rates":
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+ currencyCalcTwo();
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+ break;
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+ case "currency calc: if":
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+ currencyCalcIF();
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+ break;
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+ case "scissors":
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+ scissors();
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+ break;
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+ case "задание на синий пояс":
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+ blue();
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+ break;
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+ case "задание на черный пояс":
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+ black();
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+ break;
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+ }
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+ } else {
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+ break;
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+ }
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+ }
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+
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+ //ЗАДАНИЕ НА ЧЕРНЫЙ ПОЯС -----------------------------------------------------------------------
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+ function black() {
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+ let choise = prompt("Make ur choise").toLowerCase();
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+ let random = Math.random();
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+ (choise === "камень" && random <= 0.33) ||
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+ (choise === "ножницы" && random > 0.33 && random <= 0.66) ||
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+ (choise === "бумага" && random > 0.66)
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+ ? alert("ничья")
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+ : (choise === "камень" && random > 0.66) ||
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+ (choise === "ножницы" && random <= 0.33) ||
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+ (choise === "бумага" && random > 0.33 && random <= 0.66)
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+ ? alert("You lose")
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+ : alert("You win");
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+ }
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+ </script>
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+ </body>
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+</html>
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ilya_shyian