C program to find prime number

C program to find prime number

Output:

Enter a number to find whether it is prime number:
5
5 is a prime number

Implementation:

#include <stdio.h> int main(void) { int n,i,flag=1; printf("Enter a number to find whether it is prime number:\n"); scanf("%d",&n); for(i=2;i<n;i++) { if(n%i==0) flag=0; } if(flag) printf("%d is a prime number",n); else printf("%d is not a prime number",n); return 0; }