prime-numbers

An NPM package for finding all prime numbers within a certain integer limit.

Installation

Install this package by running the following command:

npm i @christian-js/prime-numbers

Usage

There are three functions available for use:

| Function | Description | Parameters | Return value | | ------------------ | ------------------------------------------------------ | ---------- | ------------ | | isPrime | Determines if a given number is prime or not | number | Boolean | | getPrimes | Retrieves a list of the prime numbers in a given range | max, start | Array | | getPrimesAsObjects | Returns all numbers in a given range as objects | max, start | Array |

isPrime()

The isPrime function accepts a single number and returns true or false based on whether the number is a prime number or not.

Examples

isPrime(2)      // false
isPrime(11)     // true

getPrimes()

The getPrimes function returns an array containing all prime numbers in a given range. You can optionally provide a starting number.

Examples

getPrimes(11)       // [1, 3, 5, 7, 11]
getPrimes(11, 5)    // [5, 7, 11]
getPrimes(11, -5)   // [-5, -3, -1, 1, 3, 5, 7, 11]
getPrimes(-11)      // [-1, -3, -5, -7 -11]

getPrimesAsObjects()

The getPrimesAsObjects function returns an array of objects containing all numbers in the given range and an isPrime property containing true or false. You can optionally provide a starting number.

Examples

getPrimesAsObjects(11)
/************
[
    {
        value: 1,
        isPrime: true
    },
    {
        value: 2,
        isPrime: false
    },
    {
        value: 3,
        isPrime: true
    },
    {
        value: 4,
        isPrime: false
    },
    {
        value: 5,
        isPrime: true
    },
    {
        value: 6,
        isPrime: false
    },
    {
        value: 7,
        isPrime: true
    },
    {
        value: 8,
        isPrime: false
    },
    {
        value: 9,
        isPrime: false
    },
    {
        value: 10,
        isPrime: false
    },
    {
        value: 11,
        isPrime: true
    }
]
************/