Points to note when using recursive functions in JavaScript_Basic knowledge

I won’t give a detailed text explanation, just write the code directly, it’s very clear.

<script>
 function sum(num){
 if(num<=1){
return 1;
}else{
return num*sum(num-1);
//return num*arguments.callee(num-1); //指针
//return 2;
}
}
var sum1=sum;
 alert(sum1(2));
</script>

The above code is prone to problems when executed. We introduce a method for execution, arguments.callee, which is a pointer to the function being executed. Using pointers instead of function names makes it less likely to go wrong when executing the above code!

The above code is a note on the usage of recursive functions in JavaScript. I hope it will be helpful to everyone.