This is a pretty straight-forward digital root calculator, so this doesn't need instructions. --Explaining what a Digital Root is-- For example, lets calculate the digital root of 678: 6+7+8=21->2+1=3 So the digital root of 678 is 3. "Programmatically," you can calculate a digital root of a number like this: num%9 If the num is 0, then the digital root for it is 0. If num%9 is 0, and num>0, then the digital root for it is 9.
Credits to Brilliant for the formula: https://brilliant.org/wiki/digital-root/
