sum

The sum() method adds all the numeric values of an immutable array and returns the total sum as a number.

Interactive example

Syntax

function sum<
	GenericInput extends readonly number[]
>(
	input: GenericInput
): number

Parameters

• input: Array of numbers to add.

Return value

The total sum of all the elements of the array. When the input is a tuple, TypeScript can infer a literal sum if the compiler is able to compute it.

See also

• reduce - To implement custom aggregations
• group - To group and then summarize values

Sources

• MDN Web Docs - Array.prototype.reduce()