Write a C++ program to check whether a given number is prime or not.

Answer :

File Name : c.cpp

#include<stdio.h>

#include<iostream>

using namespace std;

int a, flag=1,i;

int main(){

cout<<"Enter Number : ";

cin>>a;

for(i=2; i<=a/2; ++i){

if(a%i==0){

flag=0;

break;

}

}

if(flag==0){

cout<<a<<" is Not a prime Number"<<endl;

}else{

cout<<a<<" is a prime Number"<<endl;

}

}