Challenge 6 - Digit Sums

Finding the digit sum of a number means adding the values of all of its digits. For example, the digit sum of 123 is 1 + 2 + 3 = 6.

A mathematical algorithm for calculating a digit sum is:

1. Add the last digit of the number to the sum.
   • Set the sum equal to the sum plus the remainder of the number divided by 10.
2. Remove the last digit of the number.
   • Divide the number by 10, rounding down.
3. Repeat the previous two steps while the number is greater than zero.
4. Print the sum.

Drag blocks from the left to perform the algorithm, then click the "Run Code" button to see the output.