Recursive functions in JS

In programming languages, the function Func (Typea ,......) Call the function itself directly or indirectly. This function is called a recursive function. Recursive functions cannot be defined as inline functions. This article mainly introduces information about recursive functions in JS. For more information, see Func (Type a,…) in the programming language ,......) Call the function itself directly or indirectly. This function is called a recursive function. Recursive functions cannot be defined as inline functions.

Recursive functions:

function factorical(num){　　if(num<=1){　　　　return 1;　　}　　else{　　　　return num*factorical(num-1);　　}}factorial(2)//2

This recursive function uses a function to call the function itself. But is this really good? Let's take a look at it.

Var another = factorical; factorical = null; console. log (another (2) // an error is reported that factorical not a function

This is the drawback of function calling. How can this problem be solved?

function factorical(num){　　if(num<=1){　　　　return 1;　　}　　else{　　　　return num*arguments.callee(num-1);　　}}var another=factorical;factorical=null;console.log(another(2))//2

If you use arguments. callee to replace the function name, you can ensure that the function will not go wrong no matter how it is called.

The above is the recursive function in JS introduced by xiaobian. I hope it will help you. If you have any questions, please leave a message and I will reply to you in time. I would like to thank you for your support for PHP chinnet!

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