fix: cleanup CheckKishnamurthyNumber (TheAlgorithms#1626)

Author: vil02

Maths/CheckKishnamurthyNumber.js

@@ -24,7 +24,10 @@ const factorial = (n) =>{
 constCheckKishnamurthyNumber=(number)=>{
 // firstly, check that input is a number or not.
 if(typeofnumber!=='number'){
-returnnewTypeError('Argument is not a number.')
+thrownewTypeError('Argument is not a number.')
+}
+if(number===0){
+returnfalse
 }
 // create a variable to store the sum of all digits factorial.
 letsumOfAllDigitFactorial=0

Maths/test/CheckKishnamurthyNumber.test.js

@@ -0,0 +1,18 @@
+import{CheckKishnamurthyNumber}from'../CheckKishnamurthyNumber'
+
+describe('CheckKishnamurthyNumber',()=>{
+it.each([1,2,145,40585])('returns true for %i',(num)=>{
+expect(CheckKishnamurthyNumber(num)).toBe(true)
+})
+
+it.each([0,3,4,5,100,146,1019823,-1])(
+'returns false for %i',
+(num)=>{
+expect(CheckKishnamurthyNumber(num)).toBe(false)
+}
+)
+
+it('should throw when input is not a number',()=>{
+expect(()=>CheckKishnamurthyNumber('2')).toThrowError()
+})
+})