Home >Web Front-end >JS Tutorial >How to find factorial in javascript
How to find the factorial in javascript: 1. Use a while loop to find the factorial of a specified number; 2. Use a function to recursively find the factorial of a specified number. The code is like "function factorial(num){var result=1... }".
The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.
JS implementation example of factorial operation for finding 5.
Option 1: Using while loop
function factorial(num){ var result = 1; while(num){ result *= num; num--; } return result; } console.log(factorial(5))//120
Running result:
Option 2: Using function recursion
function factorial(num){ if(num <= 0){ return 1; }else{ return num*arguments.callee(num-1); } } console.log(factorial(5))//120
Running result:
[Recommended Study: js basic tutorial】
The above is the detailed content of How to find factorial in javascript. For more information, please follow other related articles on the PHP Chinese website!