Santi's Powerful Product Series Library

• 📘 Comes with built-in TypeScript definitions
• 🚀 Lightweight and fast
• 👴 Compliant with ECMAScript 3

API

• function product(arr: number[]): number;

  Product of the numbers in an array.

  | Name | Type | Description | Optional? | | ----- | ---------- | --------------------- | --------- | | arr | number[] | An array of numbers. | No |

  Returns the product of all numbers in the array.

• function product(fn: (n: number) => number, start: number, end: number): number;

  Product of numbers in [start, end].

  | Name | Type | Description | Optional? | | ------- | ----------------------- | ------------------------------------------------------ | --------- | | fn | (n: number) => number | A math function to process every number in the range. | No | | start | number | Inclusive start of the range. | No | | end | number | Inclusive end of the range. | No |

  Returns the product of [start, end] with a step of step.

Usage

import product from '@santi100/product-series'; // ESM
const product = require('@santi100/product-series'); // CJS

// Example 1: Product of numbers in an array
const arr = [1, 2, 3, 4, 5];
const result1 = product(arr);
console.log(result1); // Output: 120

// Example 2: Product of numbers in a range
const fn = (n: number) => n ** 2;
const start = 1;
const end = 5;
const result2 = product(fn, start, end);
console.log(result2); // Output: 14400