Kevin Math

Getting Started

Run the following command in your project folder:

npm install @ericanaglik/kevin-math --save

Then add this to your index.js file

require('@ericanaglik/src/kevin-math')

Golden Ratio

goldenRatio()
This function returns the golden ratio
Number.goldenRatio() → 1.61803398875

Rounding Methods

round()
This method rounds a number either up or down depending on which it is closest to
'9.99.round() → 10

roundDown()
This method rounds down
'9.99.roundDown() → 9

roundUp()
This method rounds up
'9.2.roundUp() → 10

Degrees ↔ Radians

degToRad(n)
This methods converts degrees to radians
45.degToRad()→ 0.785

radToDeg(n)
This methods converts radians to degrees
.785.RadTodeg()→ 44.977

Money Methods

toDollars(amount)
This method converts a number with a decimal point to a string with a dollar sign in front of it and an extra number placeholder at the end if needed
3.9.toDollars()→ '$3.90'

plusTax(rate)
This method tells you the tax on a number when you pass in the rate
100.plusTax(0.08)→ '108'

plusInterest(total, year, rate)
This methods calculates interest based on the total, year, and rate
Number.plusInterest(100,2,2)→ 104.04

mortgage(startingLoanAmount, totalPayments, interestRate)
This methods calculates mortgage based on the starting loan, the total number of payments, and the interest rate
Number.mortgage(10,5,10)→ 100.00