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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