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april-EXO wants to merge 4 commits into TheAlgorithms:master from april-EXO:master

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SimpleInterest #1081

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april-EXO Aug 7, 2022

april-EXO Aug 7, 2022

april-EXO Aug 7, 2022

april-EXO Aug 7, 2022

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1 change: 1 addition & 0 deletions DIRECTORY.md

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Expand Up		@@ -198,6 +198,7 @@
		* [ShorsAlgorithm](Maths/ShorsAlgorithm.js)
		* [SieveOfEratosthenes](Maths/SieveOfEratosthenes.js)
		* [SimpsonIntegration](Maths/SimpsonIntegration.js)
	* [SimpleInterest](Maths/SimpleIntrest.js)
		* [Softmax](Maths/Softmax.js)
		* [SquareRoot](Maths/SquareRoot.js)
		* [SumOfDigits](Maths/SumOfDigits.js)
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15 changes: 15 additions & 0 deletions Maths/SimpleInterest.js

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	/**
	* @function SimpleInterest
	* @description to calculate the amount of interest charged on a sum at a given rate and for a given period of time
	* @param {number} principal - input: the principal amount
	* @param {number} interestRate - input: the rate of interest in percentage
	* @param {number} time - input: the time period in year
	* @return {number} simpleInterest
	*/

	const SimpleInterest = (principal, interestRate, time) => {
	const simpleInterest = Math.floor((principal * interestRate * time) / 100)
	return simpleInterest
	}

	export { SimpleInterest }

13 changes: 13 additions & 0 deletions Maths/test/SimpleInterest.test.js

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	import { SimpleInterest } from '../SimpleInterest'

	describe('Testing Simple Interest Rate calculate function', () => {
	it('should 750 for principal = 5000, rate = 5%, time = 3 yrs', () => {
	expect(SimpleInterest(5000, 5, 3)).toBe(750)
	})
	it('should 750 for principal = 1000, rate = 3%, time = 2 yrs', () => {
	expect(SimpleInterest(10000, 3, 2)).toBe(600)
	})
	it('should 750 for principal = 40000, rate = 0.1%, time = 10 yrs', () => {
	expect(SimpleInterest(40000, 0.1, 10)).toBe(400)
	})
	})