Reverse a Number
How to Reverse a Number in C++ (6 Programs With Output)
BeginnerTopic: Advanced Number Programs
C++ Reverse a Number Program
This program helps you to learn the fundamental structure and syntax of C++ programming.
#include <iostream>
using namespace std;
int main() {
int num, reversed = 0, remainder;
cout << "Enter a number: ";
cin >> num;
int original = num;
while (num != 0) {
remainder = num % 10;
reversed = reversed * 10 + remainder;
num /= 10;
}
cout << "Reverse of " << original << " is: " << reversed << endl;
return 0;
}Output
Enter a number: 1234 Reverse of 1234 is: 4321
Understanding Reverse a Number
This program demonstrates 6 different methods to reverse a number: using while loop, using for loop, using recursion, using string conversion, using stack, and using array.
Note: To write and run C++ programs, you need to set up the local environment on your computer. Refer to the complete article Setting up C++ Development Environment. If you do not want to set up the local environment on your computer, you can also use online IDE to write and run your C++ programs.