Determine if an integer is even. Return true if the number is even, false if odd.

Examples:

Input: num = 4 Output: true Explanation: 4 is divisible by 2, so it is even Input: num = 7 Output: false Explanation: 7 is not divisible by 2, so it is odd Input: num = 0 Output: true Explanation: 0 is considered even as it is divisible by 2
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