## Introduction

Write a C program to check whether a number is Prime number or not using while & for loop

Check whether a number is Prime number or not using while loop

#include<stdio.h> int main() { int num, i, f; //Readind a number from user printf("Enter any number: "); scanf("%d", &num); f = 0; i = 2; while(i <= num/2) { if(num%i == 0) { f=1; break; } i++; } if(f == 0) printf("%d is a Prime Number", num); else printf("%d is Not a Prime Number", num); return 0; }

Check whether a number is Prime number or not using for loop

#include<stdio.h> int main() { int num, i, f; //Reading a number from user printf("Enter a number: "); scanf("%d",&num); f=0; for(i=2; i <= num/2; i++) { if(num%i == 0) { f=1; break; } } if(f==0) printf("%d is a Prime Number", num); else printf("%d is a Not Prime Number", num); return 0; }