A C program that will check if a number is a prime number or not

#include<stdio.h>

int main() {

int num, i, count = 0;

printf("Enter a number: ");

scanf("%d", &num);

for (i = 2; i <= num / 2; i++) {

if (num % i == 0) {

count++;

break;

}

}

if (count == 0)

printf("%d is a prime number", num);

else

printf("%d is not a prime number", num);

return 0;

}

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