Recursion is a technique, where the Function call itself directly (or) indirectly.
There are three ways to refere a function itself.
a. the function's name
b. arguments.callee
c. an in-scope variable that refers to the function
Using the functions name
HelloWorld.js
function factorial(n){
if(n 1){
return 1;
}
return n * factorial(n-1);
}
console.log(`Factorial of 5 is ${factorial(5)}`);
Output
Factorial of 5 is 120
Using arguments.callee
HelloWorld.jsfunction factorial(n){
if(n 1){
return 1;
}
return n * arguments.callee(n-1);
}
console.log(`Factorial of 5 is ${factorial(5)}`);
Using an in-scope variable that refers to the function
HelloWorld.js
var fact = function factorial(n){
if(n 1){
return 1;
}
return n * fact(n-1);
}
console.log(`Factorial of 5 is ${factorial(5)}`);
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