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dmd3475-spring-2022/week-5/eloquent-js-ch3/recursion/main.js
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| // Your code here. | |
| function isEven(x) { | |
| if (x == 0){ | |
| return true; | |
| } | |
| else if (x == 1){ | |
| return false; | |
| } | |
| else if (x < 0) { | |
| return isEven(-x); | |
| } | |
| else { | |
| return isEven(x-2); | |
| } | |
| } | |
| // Or | |
| // function isEven(x){ | |
| // if (x % 2 == 0){ | |
| // return true; | |
| // } | |
| // else { | |
| // return false; | |
| // } | |
| // } | |
| console.log(isEven(50)); | |
| // → true | |
| console.log(isEven(75)); | |
| // → false | |
| console.log(isEven(-1)); | |
| // → ?? |