The digit sum, also known as the sum of digits, is calculated by adding together all the individual digits of a given number. For instance, if you take the number 1234, the digit sum would be calculated as follows: 1 + 2 + 3 + 4 = 10 In this case, the digit sum of 1234 is 10. The concept is often used in various areas of mathematics, including number theory and numerical analysis.
Articles by others on the same topic
The digit sum of a nonnegative integer in a given base is the sum of its numerical digits. In base , replacing each power by shows that the integer and its digit sum are congruent modulo .