To spilt a number into digits and print their sum, try to run the following code −
Example
<!DOCTYPE html> <html> <body> <script> var a = 28573; var sum = 0; while(a > 0) { sum += a % 10; a = Math.floor(a / 10); } document.write("Sum of digits = "+sum); </script> </body> </html>
Output
Sum of digits = 25