The code: ```javascript return num % 2 === 0; ``` **Explanation:** - `num % 2`...

The code:

return num % 2 === 0;

Explanation:

• num % 2 calculates the remainder when num is divided by 2 (this is called the modulus operator %).
• The comparison === 0 checks if the result of the modulus operation is equal to 0.
• If num % 2 === 0 evaluates to true, it means that num is evenly divisible by 2 and is an even number.
• If the result is false, then num is not evenly divisible by 2, meaning it is an odd number.

What the code does overall: This line checks whether the input number num is an even number and returns true if it is even, or false if it is odd.