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| function factorial(n) { | |
| if ( n === 1 ) { | |
| return 1; | |
| } | |
| return n * factorial(n - 1); | |
| // or | |
| // return n === 1 ? 1 : n * factorial(n - 1); | |
| // or | |
| // return n !== 1 ? n * factorial(n - 1) : 1; | |
| // or | |
| // return n ? n * factorial(n - 1) : 1; | |
| } | |
| console.log( factorial(5) ); // 120 |