Calculator for calculating the digit sum of a number
This function returns the digit sum of the given argument. A non-negative integer must be specified as an argument.
The digit sum is the sum of the individual digits of a number.
To calculate, enter a non-negative integer, then click the 'Calculate' button.
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Digital sum of 12846
1 + 2 + 8 + 4 + 6 = 21
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