# extra-number

2.3.22 • Public • Published

A number is a mathematical object used to count, measure, and label.
📦 Node.js, 🌐 Web, 📜 Files, 📰 Docs. 📘 Wiki.

In JavaScript, Number type is double-precision 64-bit binary format IEEE 754 value. This package includes common number functions related to querying about numbers, comparing numbers, rounding numbers, performing rounded division, performing modulo operations, controlling range of numbers, performing arithmetic operations, obtaining divisors of a number (and related operations), getting the number of possible arrangements of a set of objects, performing geometry-related calculations, performing basic statistical analysis, and finding various statistical means.

This package is available in Node.js and Web formats. To use it on the web, simply use the extra_number global variable after loading with a <script> tag from the jsDelivr CDN.

Stability: Experimental.

const xnumber = require('extra-number');
// import * as xnumber from "extra-number";
// import * as xnumber from "https://unpkg.com/extra-number/index.mjs"; (deno)

xnumber.isPrime(53);
// → true

xnumber.properDivisors(6);
// → [1, 2, 3]

xnumber.round(9.1357, 0.05);
// → 9.15

xnumber.significantDigits(0.0034);
// → 2

// TOFIX:
// xnumber.fromRoman('DCXLIX');
// → 649

// xnumber.toScientific(695700000);
// → '6.957×10⁸' (radius of Sun in m)

## Index

Property Description
is Check if value is a number.
significantDigits Count the number of significant digits in a number.
compare Compare two numbers.
floor Round down a number to specific precision.
ceil Round up a number to specific precision.
round Round a number to specific precision.
floorDiv Perform floor-divison of two numbers.
ceilDiv Perform ceiling-divison of two numbers.
roundDiv Perform rounded-divison of two numbers.
rem Find the remainder of x/y with sign of x (truncated division).
mod Find the remainder of x/y with sign of y (floored division).
modp Find the remainder of x/y with +ve sign (euclidean division).
constrain Constrain a number within a minimum and a maximum value.
normalize Normalize a number from its current range into a value between 0 and 1.
remap Re-map a number from one range to another.
lerp Linearly interpolate a number between two numbers.
isPow Check if a number is a power-of-n.
prevPow Find largest power-of-n less than or equal to given number.
nextPow Find smallest power-of-n greater than or equal to given number.
root Find the nth root of a number (ⁿ√).
log Find the logarithm of a number with a given base.
properDivisors List all divisors of a number, except itself.
aliquotSum Sum all proper divisors of a number.
minPrimeFactor Find the least prime number which divides a number.
maxPrimeFactor Find the greatest prime number which divides a number.
primeFactors Find the prime factors of a number.
primeExponentials Find the prime factors and respective exponents of a number.
isPrime Check if number is prime.
gcd Find the greatest common divisor of numbers.
lcm Find the least common multiple of numbers.
factorial Find the factorial of a number.
binomial Find the number of ways to choose k elements from a set of n elements.
multinomial Find the number of ways to put n objects in m bins (n=sum(kᵢ)).
sum Find the sum of numbers (Σ).
product Find the product of numbers (∏).
median Find the value separating the higher and lower halves of numbers.
modes Find the values that appear most often.
range Find the smallest and largest values.
variance Find the mean of squared deviation of numbers from its mean.
arithmeticMean Find the average of numbers.
geometricMean Find the geometric mean of numbers.
harmonicMean Find the harmonic mean of numbers.
cubicMean Find the cubic mean of numbers.

## Package Sidebar

### Repository

github.com/nodef/extra-number

34

2.3.22

MIT

44.4 kB

6