[JS] Can someone explain the output?

Question

Given is the following function from a challenge:

function mlt(a, b) {
if(!(a && b)) {
return 0; }
else if(b == 1) {
return a;}
else{
return (a + mlt(a, b-1));
}
}
console.log(mlt(3, 11)); // returns 33
console.log(mlt(7, 1)); // returns 7

I understand the second output (7), but not the first one (33), since it is nested. I have no idea, how on earth it results 33.

Would somebody be so kind and explain it?

Answer 1

Yeah, in the end it's 3+3, but that equals 6 in common math.
It looks like it is treated as string "3"+"3" = "33"

Answer 2

Thank you for your explanation!
Now I get it 😊