sumOfDigits

The sumOfDigits function returns the sum of the digits of a number.

Syntax

sumOfDigits(value)

Parameters

Name	Type	Description
value	number	Number to be analyzed.

Return Value

Type	Description
number	The sum of the digits of the given number.

Examples

sumOfDigits(123);   // 6
sumOfDigits(2023);  // 7

Notes

• Throws a TypeError if the value is not a number.
• Useful for mathematical algorithms, validation, and checksum.

References

• MDN: String.prototype.split()
• MDN: Array.prototype.reduce()