Introduction
I have used CodeBlocks compiler for debugging purpose. But you can use any C++ programming language compiler as per your availability.
#include <iostream> #include <math.h> using namespace std; int main() { int num, i, f; //Reading a number from user cout<<"Enter any number:"; cin>>num; f = 0; i = 2; while(i <= num/2) { if(num%i == 0) { f=1; break; } i++; } if(f == 0) cout<<num<<" is a Prime Number"<<endl; else cout<<num<<" is Not a Prime Number"<<endl; return 0; }
Result
![Write C++ program to check whether a number is Prime number or not using while loop](https://techstudys.com/wp-content/uploads/2021/07/18-5.png)