add previous lessons

css/index.scss

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+body {
+	background-color: rgba(49, 61, 55, 0.87);
+}
+h1 {
+	text-align: center;
+	margin: 150px;
+	font-size: 140px;
+	text-shadow: 2px -4px 16px rgb(186, 93, 240);
+}

js/index.js

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+// 1. Задание
+alert("What is the radius of the circle?");
+prompt(" Your version? ");
+alert("Correct answer:  " + "R = P : 2 * π");
+
+// 2. Задание
+
+let distance = prompt(
+	"What is the distance in kilometers between the two cities ?"
+);
+let time = prompt("How many hours he wants to get there ?");
+
+alert(
+	" If you want to get there in " +
+		time +
+		" hours, we need to go an average of " +
+		distance / time +
+		" km per hour "
+);
+
+// 3. Задание
+
+let exDollar = 28.4;
+``;
+let exEuro = 32.1;
+let myPrice = prompt("Введите суму в долларах");
+
+alert(
+	" Если ты хочешь поменять " +
+		myPrice +
+		", ты получишь  " +
+		(exDollar * myPrice) / exEuro +
+		" евро "
+);
+
+//  4. Задание
+let result; //выплаченные проценты,
+let moneyCount; //первоначальная сумма вложений,
+let betYear = 5; //годовая ставка
+let betDays = 60; //количество дней вклада,
+let year = 365; //количество дней в году
+let perCent = 100;
+
+moneyCount = prompt(`amount of money : `);
+result = (moneyCount * betYear * betDays) / year / perCent;
+alert(`You will receive this cash: ${result.toFixed(1)}`);
+
+// 5. Задание
+let num = 2 && 0 && 3;
+let num2 = 2 || 0 || 3;
+let num3 = (2 && 0) || 3;
+console.log(num);
+console.log(num2);
+console.log(num3);