C++ Program to Condense a Number

You are Here:

Condense a Number

In the following example, we will condense a number (8654) into a single digit (5).

i.e., 8654 = 8 + 6 + 5 + 4
8654 = 23
8654 = 2 + 3
8654 = 5 (single digit)

Example

C++ Compiler
#include <iostream> #include <cmath> using namespace std; int myMethod(int a) { int copyNum = a; int remainder = 0; int result = 0; while(copyNum != 0) { remainder = copyNum % 10; result += remainder; copyNum = copyNum / 10; } return result; } int main() { int num = 8654; int userValue = num; while(num > 9) num = myMethod(num); cout << "Single Digit of " << userValue << ": " << num; return 0; }

Output

Single Digit of 8654: 5

Condense any Given Number

In the following example, we will condense any given number into a single digit.

Example

C++ Compiler
#include <iostream> using namespace std; int myMethod(int a) { int copyNum = a; int remainder = 0; int result = 0; while(copyNum != 0) { remainder = copyNum % 10; result += remainder; copyNum = copyNum / 10; } return result; } int main() { int num; cout << "Enter any Multi digit (int) number: "; cin >> num; int userValue = num; while(num > 9) num = myMethod(num); cout << "Single Digit of " << userValue << ": " << num; return 0; }

Output

Enter any Multi digit (int) number: 2468 Single Digit of 2468: 2

Reminder

Hi Developers, we almost covered 90% of String functions and Interview Question on C++ with examples for quick and easy learning.

We are working to cover every Single Concept in C++.