How Can I Efficiently Determine if a Number is Prime in C?

C Programming: Determining if a Number is Prime

To determine if a number is prime in C, you can follow these steps:

1. Iterate through numbers from 2 to the square root of the input number (to optimize the process).
2. Check if the input number is divisible by the current number in the loop.
3. If the input is divisible, return false.
4. If the input is not divisible by any number in the loop, return true.

Here's an updated C code implementation:

This optimized code efficiently checks whether a number is prime or not with minimal modification to your original idea.

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