math-lib

Description

An extension of the Number prototype chain to add some more functions to the Number object. More information about what this extension adds can be found in the API section.

API

Table of Contents

• round
• floor
• ceil
  • Examples
• pad
  • Parameters
  • Examples
• degToRad
  • Examples
• radToDeg
  • Examples
• toDollars
  • Examples
• tax
  • Parameters
  • Examples
• withTax
  • Parameters
  • Examples
• interest
  • Parameters
• mortage
  • Parameters
• decimalToHex
• GOLDENRATIO

round

Round a number to it's nearest whole number

Returns Number the closest whole number to the original number

floor

Round a number down to it's nearest whole number.

Returns Number the closest whole number to the rounded down original number.

ceil

Round a number up to it's closest whole number

Examples

Number(5.32).ceil() -> 6

Returns Number the closest whole number to the rounded up original number.

pad

Pad a number with a specified amount of zeros (On either the left or right side)

Parameters

• leftPadding
• rightPadding

Examples

Number(5.3234).pad(4,5) -> 0004.32340
Number(4.34).pad(2,0) -> 04.34
Number(23.32).pad(10,10) -> 0000000023.3200000000

Returns String A padded string that indicates.

degToRad

Convert a number from degrees to radians

Examples

Number(20).degToRad() -> 0.349066

Returns Number The converted number in radians

radToDeg

Convert a number from radians to degrees

Examples

Number(1).radToDeg() -> 57.2958

Returns Number the converted number in degrees.

toDollars

Convert a number to USD.

Examples

Number(1).toDollars() -> $1.00
 Number(1.05).toDollars() -> $1.05
 Number(0.5).toDollars() -> ¢0.5

Returns String The dollar representation of the number

tax

Return the tax amount from the number that would be applied given the rate

Parameters

• rate Number The tax rate to be applied where the rate is 0 <= rate <= 100 or the rate is 0 <= 100

Examples

Number(10).tax(10) -> 1.00
 Number(60).tax(25) -> 15.00

Returns Number the total tax amount of the current number multiplied by the rate

withTax

Return this number with a specified tax rate applied to it.

Parameters

• rate Number The tax rate to be applied

Examples

Number(10).withTax(10) -> 11
 Number(200).withTax(50) -> 300

Returns Number a new number that has the tax of the original number applied.

interest

Calculate the interest on a number given the interest rate, years, and optional decimal places to round to

Parameters

• rate Number The interest rate
• years Number The amount of years the rate is applied to return {String} a string containing the total interest paid on a given number
• decimalPlaces (optional, default 2)

mortage

Calculate the monthly payments for a mortage given a principal (Number)

Parameters

• interestRate Number The yearly rate of interest
• numberOfYears Number the years remaining for the mortage

Returns Number The monthly mortage payments that need to be made to pay off the mortage

decimalToHex

convert a decimal number to hexadecimal, all thanks to the help of this stack overflow question: https://stackoverflow.com/questions/57803/how-to-convert-decimal-to-hexadecimal-in-javascript

Returns String The string containing the number converted to hexadecimal

GOLDENRATIO

The golden ratio as approximated by: https://en.wikipedia.org/wiki/Golden_ratio

Type: Number