Discover MakerZone

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi test

Learn more

Discover what MATLAB® can do for your career.

Opportunities for recent engineering grads.

Apply Today

MATLAB Academy

New to MATLAB?

Learn MATLAB today!

Problem 1164. Sum the Digits of a Number

Created by Joseph Kirk

Given an integer, sum the digits repeatedly until you end up with a single value less than 10.

For example, if you add the digits of the number 123456789, you get 1+2+3+4+5+6+7+8+9 = 45, and then 4+5 = 9

The input will be a string of digits. The output should be the scalar value of the repeated sum of digits.

Tags

Problem Group

Solution Statistics

125 correct solutions 156 incorrect solutions
Last solution submitted on Jun 15, 2016

Problem Comments