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average

TS JS Deno

Returns the average of two or more numbers.

Use Array.prototype.reduce() to add each value to an accumulator, initialized with a value of 0, divide by the length of the array.

typescript
const average = <T extends number>(...nums: number[]) =>
nums.reduce((acc, val) => acc + val, 0) / nums.length;
typescript
average(...[1, 2, 3, 4]); // 2.5
average(1, 2, 3); // 2