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Sum Digits

sumDigits​

The sumDigits function calculates the sum of all digits in a given number, ignoring the sign of the number.

Function Signature​

function sumDigits(num: Numeric): number;

Parameters​

  • num: The number (or numeric string) whose digits will be summed.

Return Value​

  • Returns the sum of all digits in the number. If the number is negative, the sign is ignored.

Example Usage​

Basic Digit Summation​

import { sumDigits } from 'nhb-toolbox';

console.log(sumDigits(123));  // 6 (1 + 2 + 3)

Handling Negative Numbers​

import { sumDigits } from 'nhb-toolbox';

console.log(sumDigits(-456));  // 15 (4 + 5 + 6)

Summing Digits from a Stringified Number​

import { sumDigits } from 'nhb-toolbox';

console.log(sumDigits('789'));  // 24 (7 + 8 + 9)

Notes​

  • The function ignores the sign of the number by using Math.abs.
  • Works with both number types and numeric strings.
  • The digits are summed after converting the number to a string and splitting it into individual characters.

Conclusion​

The sumDigits function provides a simple way to calculate the sum of digits of any number, regardless of its sign. It is a straightforward utility to analyze or process numeric values at the digit level.