👌 IMPROVE: changed variable name from inc to candidateValue and thrown error in case of invalid input

Author: omkarnathparida

Project-Euler/Problem007.js

@@ -12,16 +12,16 @@ import { PrimeCheck } from '../Maths/PrimeCheck.js'
  */
 export const nthPrime = (n) => {
   if (n < 1) {
-    return 'Invalid Input'
+    throw new Error('Invalid Input')
   }
 
   let count = 0
-  let inc = 2
+  let candidateValue = 2
   while (count < n) {
-    if (PrimeCheck(inc)) {
+    if (PrimeCheck(candidateValue)) {
       count++
     }
-    inc++
+    candidateValue++
   }
-  return inc - 1
+  return candidateValue - 1
 }

Project-Euler/test/Problem007.test.js

@@ -2,10 +2,10 @@ import { nthPrime } from '../Problem007.js'
 
 describe('checking nth prime number', () => {
   it('should be invalid input if number is negative', () => {
-    expect(nthPrime(-3)).toBe('Invalid Input')
+    expect(() => nthPrime(-3)).toThrowError('Invalid Input')
   })
   it('should be invalid input if number is 0', () => {
-    expect(nthPrime(0)).toBe('Invalid Input')
+    expect(() => nthPrime(0)).toThrowError('Invalid Input')
   })
   test('if the number is greater than 0', () => {
     expect(nthPrime(10)).toBe(29)