Answer to Question #259039 in C++ for Charmaine

Question

Write a program to enter any number and check whether the number is prime number or not

Answer 1

#include <iostream>


using namespace std;


bool isPrimeNumber(int number)
{
    if(number == 1)
        return false;
    if(number == 2)
        return true;


    for(int i = 2; i < number; i++)
    {
        if(number%i == 0)
            return false;
    }
    return true;
}


int main()
{
    cout << "number = ";
    int number;
    cin >> number;


    cout << endl;
    if(isPrimeNumber(number))
        cout << number << " is a prime number";
    else
        cout << number << " is not a prime number";


    cout << endl << endl;


    return 0;
}