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@@ -0,0 +1,241 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+
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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>HW3</title>
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+</head>
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+
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+<body>
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+ <script>
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+ let nameHomeWork = prompt("Ведите название дз")
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+ switch (nameHomeWork) {
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+
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+ case "switch: sizes":
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+ let sizeUk = prompt(
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+ "Выберете размер женской обуви: \n34\n34.5\n35\n35.5\n36\n36.5\n37\n37.5\n38\n38.5\n39\n39.5\n40\n40.5"
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+ );
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+ switch (sizeUk) {
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+ case "34":
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+ alert(5 + " USA");
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+ break;
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+ case "34.5":
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+ alert(5.5 + " USA");
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+ break;
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+ case "35":
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+ alert(6 + " USA");
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+ break;
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+ case "35.5":
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+ alert(6.5 + " USA");
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+ break;
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+ case "36":
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+ alert(7 + " USA");
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+ break;
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+ case "36.5":
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+ alert(7.5 + " USA");
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+ break;
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+ case "37":
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+ alert(8 + " USA");
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+ break;
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+ case "37.5":
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+ alert(8.5 + " USA");
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+ break;
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+ case "38":
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+ alert(9 + " USA");
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+ break;
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+ case "38.5":
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+ alert(9.5 + " USA");
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+ break;
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+ case "39":
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+ alert(10 + " USA");
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+ break;
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+ case "39.5":
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+ alert(10.5 + " USA");
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+ break;
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+ case "40":
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+ alert(11 + " USA");
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+ break;
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+ case "41":
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+ alert(11.5 + " USA");
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+ break;
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+ default:
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+ alert(" ошибка");
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+ }
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+ break;
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+
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+ case "switch: if":
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+
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+ let color = prompt("Введите цвет", "");
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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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+ break;
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+
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+ case "prompt: or":
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+
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+
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+ let age = prompt("Введите ваш возраст", "")
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+ if (age) {
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+ result = 2022 - age
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+ alert(result + " год рождения.");
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+ } else if (age == "" || age == null) {
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+ alert("Ошибка");
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+ } else {
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+ alert("Ошибка");
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+ }
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+
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+
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+ break;
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+
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+ case "confirm: or this days + confirm: if this days":
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+
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+ let box = confirm("Шоппинг ?");
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+ if (box) {
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+ alert("Урааааа !!!");
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+ } else if (box == "" || box == null) {
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+ alert("Ну ты и БЯКАААА");
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+ } else {
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+ alert("Ну ты и БЯКАААА");
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+ }
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+
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+ break;
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+
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+ case "triple prompt":
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+
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+ let username = prompt("Введите имя");
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+ let surname = prompt("Введите фамилию");
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+ let fathername = prompt("Введите отчество");
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+
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+ alert(username + " " + surname + " " + fathername);
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+
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+ break;
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+
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+ case "default: or":
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+
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+ let username2 = prompt("Введите имя") || "Vasya"
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+ let surname2 = prompt("Введите фамилию") || "Pupkin"
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+ let fathername2 = prompt("Введите отчество") || "Viktorovich"
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+ alert(username2 + " " + surname2 + " " + fathername2)
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+
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+ break;
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+
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+ case "default: if":
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+
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+ let username3 = prompt("Введите имя");
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+ let surname3 = prompt("Введите фамилию");
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+ let fathername3 = prompt("Введите отчество")
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+ if (username3 == "" || null) {
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+ alert("Vasya")
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+ }
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+ if (surname3 == "" || null) {
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+ alert("Pupkin")
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+ }
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+ if (fathername3 == "" || null) {
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+ alert("Viktorovich")
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+ }
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+
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+ break;
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+
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+ case "login and password":
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+
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+ let login = prompt("Введите ваш логин");
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+ if (login == "admin") {
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+ password = prompt("Введите ваш пароль")
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+ if (password == "qwerty") {
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+ alert("Приймите мои поздравления !!!")
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+ } else {
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+ alert("Опа, ошибка")
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+ }
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+ } else {
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+ alert("Опа, ошибка")
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+ }
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+
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+ break;
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+
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+ case "currency calc + currency calc: improved":
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+ //currency calc + currency calc: improved
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+
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+ let calc = prompt("usd или eur ?").toLowerCase();
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+ switch (calc) {
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+ case "usd":
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+ alert(prompt("Введите UAH") / 32.787 + " USD");
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+ break;
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+ case "eur":
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+ alert(prompt("Введите UAH") / 34.483 + " EUR");
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+ break;
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+ }
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+
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+ break;
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+
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+ case "currency calc: two rates":
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+
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+ let calc2 = prompt("usd или eur ?").toLowerCase();
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+ switch (calc2) {
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+ case "usd":
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+ let salePurchase = confirm("Продажа или Покупка? Продажа - OK ; Покупка - Отмена") ? prompt(
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+ "Введите UAH") / 32.787 : prompt("Введите UAH") / 29.255;
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+ alert(salePurchase + " USD");
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+ break;
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+ case "eur":
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+ let salePurchase2 = confirm("Продажа или Покупка? Продажа - OK ; Покупка - Отмена") ? prompt(
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+ "Введите UAH") / 34.483 : prompt("Введите UAH") / 30.389;
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+ alert(salePurchase2 + " EUR");
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+ break;
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+ }
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+
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+ break;
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+
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+ case "currency calc: if":
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+
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+ let currency = prompt("USD или EUR ?").toLowerCase();
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+ let usdSale = 32.787;
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+ let usdPurchase = 29.255;
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+ let eurSale = 34.483;
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+ let eurPurchase = 30.389;
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+ if (currency == "usd") {
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+ let salePurchase = confirm("Продажа или Покупка? Продажа - OK ; Покупка - Отмена") ? prompt(
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+ "Введите UAH") /
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+ usdSale : prompt("Введите UAH") / usdPurchase;
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+ alert(salePurchase + " USD");
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+ } else if (currency == "eur") {
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+ let salePurchase2 = confirm("Продажа или Покупка? Продажа - OK ; Покупка - Отмена") ? prompt(
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+ "Введите UAH") / eurSale : prompt("Введите UAH") / eurPurchase;
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+ alert(salePurchase2 + " EUR");
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+ } else {
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+ alert("Bye");
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+ }
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+ break;
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+
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+ case "Задание на синий пояс":
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+
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+ let userCurrency = prompt("Выберите валюту: USD или EUR").toLowerCase();
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+ let ratios = {
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+ usd: "25.6",
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+ eur: "29",
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+ }
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+ if (userCurrency == "usd") {
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+ alert(prompt("Введите UAH") / ratios["usd"]);
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+ } else if (userCurrency == "eur") {
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+ alert(prompt("Введите UAH") / ratios["eur"]);
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+ } else {
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+ alert("error")
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+ }
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+ break;
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+ }
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+ </script>
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+</body>
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+
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+</html>
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