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@@ -0,0 +1,164 @@
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+/* switch: sizes */
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+
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+ let country = prompt("Какой размер обуви вы хотите узнать: Европейский/США?")
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+ let size = prompt("Введите длину вашей стопы в см.")
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+ switch(country) {
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+ case "США": switch(size){
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+ case "24.5": alert("7US")
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+ break;
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+ case "25": alert("7.5US")
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+ break;
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+ case "25.5": alert("8US")
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+ break;
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+ case "26": alert("9US")
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+ break;
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+ case "26.5": alert("9.5US")
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+ break;
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+ case "27": alert("10US")
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+ break;
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+ case "27.5": alert("10.5US")
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+ break;
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+ case "28": alert("11US")
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+ break;
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+ case "28.5": alert("11.5US")
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+ break;
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+ case "29": alert("12US")
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+ break;
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+ default: alert("Данного размера не существует")
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+ }
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+ break;
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+ case "Европейский": switch(size){
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+ case "24.5": alert("40")
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+ break;
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+ case "25": alert("40.5")
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+ break;
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+ case "25.5": alert("41")
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+ break;
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+ case "26": alert("42")
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+ break;
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+ case "26.5": alert("42.5")
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+ break;
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+ case "27": alert("43")
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+ break;
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+ case "27.5": alert("43.5")
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+ break;
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+ case "28": alert("44")
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+ break;
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+ case "28.5": alert("44.5")
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+ break;
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+ case "29": alert("45")
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+ break;
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+ default: alert("Данного размера не существует")
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+ }
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+ }
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+
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+/* 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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+ alert(document.write("<div style='background-color: red;'>красный</div>"))
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+ }
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+ else if(color == "black"){
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+ alert(document.write("<div style='background-color: black; color: white;'>черный</div>"))
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+ }
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+ else if(color == "blue"){
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+ alert(document.write("<div style='background-color: blue;'>синий</div>"))
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+ }
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+ else if(color == "green"){
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+ alert(document.write("<div style='background-color: green;'>зеленый</div>"))
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+ }
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+ else {
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+ alert(document.write("<div style='background-color: gray;'>Я не понял</div>"))
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+ }
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+
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+/* prompt: or */
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+
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+ let age = prompt("Укажите Ваш возраст.")
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+ let years = 2022;
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+ let YearOfBirth = years - age;
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+ if (age === '' || age === "null"){
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+ alert("Ошибка")
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+ }
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+ else {
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+ alert(YearOfBirth)
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+ }
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+
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+/* confirm: or this days */
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+
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+ let shopping1 = confirm("шопинг?") || alert("ты - бяка")
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+
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+/* confirm: if this days */
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+
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+ let shopping = confirm("шопинг?");
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+ if (shopping){
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+
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+ }
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+ else{ (shopping === '' || shopping === "null")
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+ alert("ты - бяка")
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+ }
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+
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+/* triple prompt */
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+
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+ let surname = prompt("Напишите Вашу Фамилию.")
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+ let lastname = prompt("Напишите Ваше Имя.")
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+ let patronymic = prompt("Напишите Ваше Отчество")
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+ let fullName = surname + " " + lastname + " " + patronymic
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+ alert(fullName)
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+
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+/* default: or */
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+
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+ let surname1 = prompt("Напишите Вашу Фамилию")
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+ let name1 = prompt("Напишите Ваше Имя")
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+ let patronymic1 = prompt("Напишите Ваше отчество")
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+ surname1 = surname1 || "Иванов"
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+ name1 = name1 || "Иван"
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+ patronymic1 = patronymic1 || "Иванович"
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+ alert(surname1 + ' ' + name1 + ' ' + patronymic1)
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+
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+/* default: if */
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+
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+ let surname2 = prompt("Напишите Вашу Фамилию")
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+ let name2 = prompt("Напишите Ваше Имя")
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+ let patronymic2 = prompt("Напишите Ваше отчество")
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+ if (!surname2){
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+ surname2 = "Иванов"
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+ }
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+ if (!name2){
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+ name2 = "Иван"
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+ }
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+ if (!patronymic2){
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+ patronymic2 = "Иванович"
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+ }
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+
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+
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+ alert(surname2 + ' ' + name2 + ' ' + patronymic2)
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+
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+/* login and password */
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+
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+ let login = prompt("Введите логин.");
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+ if (login == "admin"){
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+ let password = prompt("Введите пароль.");
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+ if (password == "qwertly"){
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+ alert("Поздравляем!")
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+ }
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+ else{
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+ alert("Ошибка")
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+ }
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+ }
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+ else{
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+ alert("Ошибка")
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+ }
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+
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+/* currency calc */
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+
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+ let currency = prompt("Какую валюты Вы хотите конвертировать? usd/eur")
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+ let sum = prompt("Введите сумму в грн.")
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+ let well;
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+ switch(currency) {
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+ case "usd":
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+ well = 35
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+ break
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+ case "eur":
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+ well = 37
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+ }
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+ alert(sum * well)
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