Recursive function returns undefined in javascript

Asked Oct 18 '20 at 15:09

Active Oct 18 '20 at 15:09

Viewed 35 times

My Function in javscript:

function gcd(a , b){
    if (b == 0){
        console.log(a);
        return;
    }
    return gcd(b , a%b);
}

When called

gcd(270 , 192);

OUTPUT:

but when this:

console.log(gcd(270 , 192);

OUTPUT:

6
undefined

In c

typedef double num;
num gcd(num a , num b){
    if (b == 0){
        return a;
    }
    gcd(b , (int)a%(int)b);
}

int main(void){
printf("%d\n" (int)gcd(270, 192));
}

OUTPUT:

What is wrong with my javascript code?

asked Oct 18 '20 at 15:09

dumb programmer

I added ```return a; ``` and it still was the same – dumb programmer Oct 18 '20 at 15:10
`return;` means "return `undefined`". – Pointy Oct 18 '20 at 15:11
`if (b == 0) return a` – adiga Oct 18 '20 at 15:11
1

In your `c` version you have `return a`, so don't leave it out for the JS version,.. – Keith Oct 18 '20 at 15:17

Recursive function returns undefined in javascript

0 Answers0