Sandbox::https://github.com/sibalonecoding-code/JavaScript/blob/master/Maths/AverageMean.js

Repository navigation

30 lines (27 loc) · 836 Bytes

/**

* @function mean

* @description This script will find the mean value of a array of numbers.

* @param {number[]} numbers - Array of integer

* @return {number} - mean of numbers.

* @throws {TypeError} If the input is not an array or contains non-number elements.

* @throws {Error} If the input array is empty.

* @see [Mean](https://en.wikipedia.org/wiki/Mean)

* @example mean([1, 2, 4, 5]) = 3

* @example mean([10, 40, 100, 20]) = 42.5

const mean = (numbers) => {

if (!Array.isArray(numbers)) {

throw new TypeError('Invalid Input')

} else if (numbers.length === 0) {

throw new Error('Array is empty')

}

let total = 0

numbers.forEach((num) => {

if (typeof num !== 'number') {

throw new TypeError('Invalid Input')

}

total += num

})

return total / numbers.length

}

export { mean }