JavaScript Program to find Sum of Digits

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Find Sum of Digits

In the following example, we will add all the digits in the given number (12345) for just one time.

For example, 12345 = 1 + 2 + 3 + 4 + 5
i.e., 12345 = 15


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<!DOCTYPE html> <html> <body> <h1>JS Sum of Digits</h1> <script> var num = 12345; var copyNum = num; var total = 0; //Add Each digit from last digit. while(copyNum != 0) { total += copyNum % 10; copyNum = Math.floor(copyNum / 10); } // result document.write("The sum of digit " +num +" is " +total); </script> </body> </html>


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