Prime
Coder96
plain_text
3 years ago
580 B
6
Indexable
#include <stdio.h> int main() { int n, i, flag = 0; printf("Enter a positive integer: "); scanf("%d", &n); // 0 and 1 are not prime numbers // change flag to 1 for non-prime number if (n == 0 || n == 1) flag = 1; for (i = 2; i <= n / 2; ++i) { // if n is divisible by i, then n is not prime // change flag to 1 for non-prime number if (n % i == 0) { flag = 1; break; } } // flag is 0 for prime numbers if (flag == 0) printf("%d is a prime number.", n); else printf("%d is not a prime number.", n); return 0; }
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