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Factorial (Javascript)
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| var factorial = function(num) { | |
| return !num ? 1 : num *= factorial(num - 1); | |
| } | |
| // Shorter ES6 variant | |
| // const factorial = num => !num ? 1 : num *= factorial(num-1); | |
| alert(factorial(6)); // 720 | |
| // https://jsfiddle.net/2ary59t0/157/ |
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