SCE

C program that receives an integer number and determines if it is a prime number

###### Posted by Samath

Last Updated:
June 01, 2015

Write a C program that receives an integer number and determines if it is a prime number or not.

#include <stdio.h> #include <stdlib.h> bool isPrime(int n); int main(int argc, char *argv[]) { int num; printf("Please enter a number: "); scanf("%d", &num); if(isPrime(num)) { printf("%d is a prime number\n",num); } else { printf("%d is NOT a prime number\n",num); } } bool isPrime(int n) { long i; if (n < 2) return false; for (i = 2; i < n; i++) { if ((n % i) == 0) return false; } return true; }