Home > C Program to find a Prime Number **Output: **

Below is the program to find whether a given number is a prime number or not. Use this code to find the prime numbers from the given set of integers.

#include <stdio.h> int main() { int n, i, flag = 0; printf("Enter a positive integer: "); scanf("%d", &n); for(i = 2; i <= n/2; ++i) { // condition for non prime number if(n%i == 0) { flag = 1; break; } } if (n == 1) { printf("1 is neither a prime nor a composite number."); } else { if (flag == 0) printf("%d is a prime number.", n); else printf("%d is not a prime number.", n); } return 0; }

Enter a positive integer: 29 29 is a prime number.