C++ Exercises: Calculate product of digits of any number

Last update on December 20 2024 12:23:25 (UTC/GMT +8 hours)

Write a program in C++ to calculate the product of the digits of any number.

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Sample Solution:

C++ Code :

#include <iostream> // Include the input/output stream library
using namespace std; // Using standard namespace

int main() // Main function where the execution of the program starts
{
    int num1, num2, r, pro = 1, i; // Declare integer variables num1, num2, r, pro, and i

    // Display message asking for input
    cout << "\n\n Find the product of digits of a given number:\n";
    cout << "--------------------------------------------------\n";
    cout << " Input a number: ";
    cin >> num1; // Read input for the number from the user

    num2 = num1; // Assign the input number to variable 'num2'

    // Loop to calculate the product of digits of the number
    for (i = num1; i < 0; i = i / 10) 
    {
        r = i % 10; // Extract the digit from the number
        pro = pro * r; // Calculate the product of the digits
    }

    // Display the product of digits of the number
    cout << " The product of digits of " << num2 << " is: " << pro << endl;
}

Sample Output:

 Find the product of digits of a given number:                         
--------------------------------------------------                     
 Input a number: 3456                                                  
 The product of digits of 3456 is: 360 

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