Programs using Loops in C++

Back to: C++ Tutorials For Beginners and Professionals

Programs using Loops in C++

In this article, I am going to discuss Programs using Loops in C++ with Examples. Please read our previous articles, where we discussed Armstrong Number using Loop in C++ with Examples.

Program to find GCD of two numbers using C++:

GCD means ‘Greatest Common Division’. It is the largest number that divides both of them. Let us look at the program.

#include <iostream>
using namespace std;
int main()
{
    int n, m;
    cout << "Enter 2 numbers: ";
    cin >> m >> n;
    cout << endl;
    cout << "GCD of " << m << " & " << n << " is ";
    while (m != n)
    {
        if (m > n)
           m = m - n;
        else if (n > m)
           n = n - m;
    }
    cout << m;
    return 0;
}

Output:

Program to check given number is palindrome or not using C++:

When the given number is equal to its reverse then it is called palindrome i.e. 151, 2552, etc. Let us look at the program.

#include <iostream>
using namespace std;
int main ()
{
    int n, r, rev = 0, m;
    cout << "Enter n: ";
    cin >> n;
    cout << endl;
    m = n;
    while (n > 0)
    {
        r = n % 10;
        n = n / 10;
        rev = rev * 10 + r;
    }
    cout << "Number is ";
    if (rev == m)
        cout << "Palindrome";
    else
        cout << "not Palindrome";
    return 0;
}

Output:

In the next article, I am going to discuss Practice Arrays in C++ with examples. Here, in this article, I try to explain Programs using Loops in C++ with examples. I hope you enjoy this Program using the Loops in C++ article. I would like to have your feedback. Please post your feedback, question, or comments about this article.