Square Function: square

Goal: create a function square(num) that returns the square of the given number.

function square(num) {
  return num * num;
}
 
window.square = square;

Task description

Create a function square that takes a number and returns its square.

How the function should work:

1. Takes one parameter — a number
2. Returns the result of squaring that number
3. Should work correctly with negative and floating‑point numbers

Usage examples:

square(3); // 9
square(-4); // 16
square(1.5); // 2.25

Requirements:

• The function must be named square
• Takes one argument — a number
• Returns a number equal to the square of the argument
• Must work for any number, including negative and floating‑point numbers
• Must not cause side effects