Created
June 22, 2015 09:20
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| //isEven recursive | |
| 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); | |
| } | |
| } | |
| console.log(isEven(50)); | |
| // → true | |
| console.log(isEven(75)); | |
| // → false | |
| console.log(isEven(-1)); | |
| // → ?? |
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