Determine if a given integer is odd. Return true if the number is odd, false if it's even.

Examples:

Input: num = 15 Output: true Explanation: 15 divided by 2 has remainder 1, so it's odd Input: num = 4 Output: false Explanation: 4 is divisible by 2 with no remainder, so it's even Input: num = 0 Output: false Explanation: Zero is considered an even number
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