3rd task is done

03/script.js

@@ -13,4 +13,136 @@ if (color === "red") {
     document.write("<div style='background-color: green;'>green</div>");
 } else {
     document.write("<div style='background-color: gray;'>I can't understand</div>");
+}
+
+// ------------------confirm: or this days ------------------------------------
+
+let shopping = confirm("шопинг?");
+if (shopping === false) {
+    alert("ты - бяка");
+}
+
+// ------------------triple prompt ------------------------------------
+
+let name = prompt("Enter your name");
+let surname = prompt("Enter your surname");
+let fathersName = prompt("Enter your fathersName");
+
+alert(`${name} ${surname} ${fathersName}`);
+
+// ------------------default: of ------------------------------------
+
+let name = prompt("Enter your name");
+if (typeof(name) != String) {
+    name = "Валерий";
+}
+
+let surname = prompt("Enter your surname");
+if (typeof(surname) != String) {
+    surname = "Иванов";
+}
+
+let fathersName = prompt("Enter your fathersName");
+if (typeof(fathersName) != String) {
+    fathersName = "Дмитриевич";
+}
+
+alert(`${name} ${surname} ${fathersName}`);
+
+// ------------------login and password ------------------------------------
+
+let login = prompt('Enter login', 'default');
+if (login == 'admin') {
+    let password = prompt('Password', 'Enter password');
+    if (password == 'qwerty') {
+        alert('Hello Admin');
+    } else if (password == '' || password == null) {
+        alert('Wrong password');
+    } else {
+        alert('Cancelled');
+    }
+} else if (login == null || login == '') {
+    alert('Cancelled');
+} else {
+    alert("Login is wrong");
+}
+
+// ------------------currency calc ------------------------------------
+
+const dollarUSDtoBuy = 28.25;
+const dollarUSDforSale = 28.37;
+const euroEURtoBuy = 33.25;
+const euroEURforSale = 33.35;
+let currency = (prompt("Enter currency", "USD or EUR").toUpperCase());
+let forChange = +prompt("Enter number HRN for change");
+let buyOrSale = confirm("To you want to buy?")
+
+switch (currency, buyOrSale) {
+    case "USD" && true: 
+        alert(dollarUSDtoBuy * forChange);
+        break;
+    case "USD" && false: 
+        alert(dollarUSDforSale * forChange);
+    break;
+    case "EUR" && true:
+        alert(euroEURtoBuy * forChange);
+        break;
+    case "EUR" && false:
+        alert(euroEURforSale * forChange);
+        break;
+    default:
+        alert("Wrong data were entered");
+}
+
+// ------------------currency calc: if ------------------------------------
+
+const dollarUSDtoBuy = 28.25;
+const dollarUSDforSale = 28.37;
+const euroEURtoBuy = 33.25;
+const euroEURforSale = 33.35;
+let currency = (prompt("Enter currency", "USD or EUR").toUpperCase());
+let forChange = +prompt("Enter number HRN for change");
+let buyOrSale = confirm("To you want to buy?")
+
+if (currency === "USD" && buyOrSale === true) {
+    alert(dollarUSDtoBuy * forChange);
+} else if (currency === "USD" && buyOrSale === false) {
+    alert(dollarUSDforSale * forChange);
+} else if (currency === "EUR" && buyOrSale === true) {
+    alert(euroEURtoBuy * forChange);
+} else if (currency === "EUR" && buyOrSale === false) {
+    alert(euroEURforSale * forChange);
+} else {
+    alert("Wrong data were entered");
+}
+
+// ------------------scissors ------------------------------------
+
+let userChoise = prompt("Enter your choise", "rock, paper, scissors"); 
+let computerChoise = Math.random();
+if (computerChoise < 0.33) {
+    computerChoise = "rock"
+    alert("rock");
+} else if (computerChoise > 0.33 && computerChoise < 0.66) {
+    computerChoise = "paper"
+    alert("paper");
+} else {
+    computerChoise = "scissors"
+    alert("scissors");
+}
+
+if (userChoise === "rock" && computerChoise === "scissors" ) {
+    alert("User wins");
+} else if (userChoise === "rock" && computerChoise === "rock" ) {
+    alert("Nobody wins");
+} else if (userChoise === "paper" && computerChoise === "rock" ) {
+    alert("User wins");
+} else if (userChoise === "paper" && computerChoise === "paper" ) {
+    alert("Nobody wins");
+} else if (userChoise === "scissors" && computerChoise === "paper" ) {
+    alert("User wins");
+} else if (userChoise === "scissors" && computerChoise === "scissors" ) {
+    alert("Nobody wins");
+} else {
+    alert("Computer wins");
 }