Programs using Loops in C++

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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;

}

#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; }

#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;

}

#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; }

#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.

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About the Author: Pranaya Rout

Pranaya Rout has published more than 3,000 articles in his 11-year career. Pranaya Rout has very good experience with Microsoft Technologies, Including C#, VB, ASP.NET MVC, ASP.NET Web API, EF, EF Core, ADO.NET, LINQ, SQL Server, MYSQL, Oracle, ASP.NET Core, Cloud Computing, Microservices, Design Patterns and still learning new technologies.