Question

How to use tail recursion in JavaScript

Answer 1

function tail_recursion(x, total = 0) {
    if (x === 0) {
        return total;
    } else {
        console.log("tail_recursion(" + String(x - 1) + ", " + String(total + x) + ");")
        return tail_recursion(x - 1, total + x);
    }
} 
 
console.log(tail_recursion(6));
 
 
 
 
/*
run:
 
"tail_recursion(5, 6);"
"tail_recursion(4, 11);"
"tail_recursion(3, 15);"
"tail_recursion(2, 18);"
"tail_recursion(1, 20);"
"tail_recursion(0, 21);"
21
 
*/

 

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