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```javascript
// Функция возвращает квадрат числа
function squareNumber(num) {
return num * num;
}
// Функция возвращает сумму двух чисел
function sumTwoNumbers() {
let num1 = parseFloat(prompt('Введите первое число:'));
let num2 = parseFloat(prompt('Введите второе число:'));
return num1 + num2;
}
// Функция отнимает от первого числа второе и делит на третье
function calculateExpression() {
let num1 = parseFloat(prompt('Введите первое число:'));
let num2 = parseFloat(prompt('Введите второе число:'));
let num3 = parseFloat(prompt('Введите третье число:'));
return (num1 - num2) / num3;
}
// Функция возвращает день недели на русском языке
function getDayOfWeek(day) {
const daysOfWeek = ['Понедельник', 'Вторник', 'Среда', 'Четверг', 'Пятница', 'Суббота', 'Воскресенье'];
return daysOfWeek[day - 1];
}
```
**index1.html**
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>JS Functions</title>
<script src="scripter.js"></script>
</head>
<body>
<script>
let numToSquare = parseFloat(prompt('Введите число для возведения в квадрат:'));
alert('Квадрат числа ' + numToSquare + ' равен ' + squareNumber(numToSquare));
alert('Сумма двух чисел равна: ' + sumTwoNumbers());
alert('Результат выражения (первое число - второе) / третье число: ' + calculateExpression());
let dayNumber = parseInt(prompt('Введите число от 1 до 7 для получения дня недели:'));
alert('День недели: ' + getDayOfWeek(dayNumber));
</script>
</body>
</html>
```
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