Determine Even Number in JavaScript

This challenge focuses on a fundamental concept in programming: determining if a given number is even. Checking for even numbers is a common operation in various algorithms and data processing tasks, forming the basis for more complex calculations. Your task is to write a JavaScript function that accurately identifies whether a number is even or not.

Problem Description

You are required to create a JavaScript function named isEven that takes a single numerical argument (number) and returns true if the number is even, and false otherwise. A number is considered even if it is perfectly divisible by 2, meaning the remainder of the division is 0. The function should handle both positive and negative integers, as well as zero.

Key Requirements:

• The function must be named isEven.
• It must accept a single argument, number, which is expected to be a number.
• It must return a boolean value: true if the number is even, false if it's odd.
• The function should correctly handle zero as an even number.

Expected Behavior:

The function should use the modulo operator (%) to determine the remainder when the number is divided by 2. If the remainder is 0, the number is even.

Examples

Example 1:

Input: 4
Output: true
Explanation: 4 divided by 2 has a remainder of 0, therefore it is even.

Example 2:

Input: 7
Output: false
Explanation: 7 divided by 2 has a remainder of 1, therefore it is odd.

Example 3:

Input: -2
Output: true
Explanation: -2 divided by 2 has a remainder of 0, therefore it is even.

Example 4:

Input: 0
Output: true
Explanation: 0 divided by 2 has a remainder of 0, therefore it is even.

Constraints

• The input number will always be an integer.
• The input number can be positive, negative, or zero.
• The function should execute efficiently for all valid integer inputs. Performance is not a primary concern for this simple task, but avoid unnecessarily complex operations.

Notes

Consider using the modulo operator (%) to determine the remainder of a division. Remember that the modulo operator returns the remainder of a division. Think about how you can use this to determine if a number is divisible by 2. The function should be concise and readable.