Return value always undefined

Question

I'm trying to implement GCD function using recursion, but when i make a return value, it always returns undefined, while if i made a console.log(value) it shows it correctly?

here is the code i'm using:

 let a = 6 let b = 4 var gcd = gcdRec(a, b) console.log(gcd) //this executes undefined function gcdRec(a, b) { var gcd = 0 if (a % b === 0) { gcd = b return gcd //if i used console.log(gcd) it prints correctly } else { var temp = bb = a % ba = temp if (b === 0) { gcd = a return gcd } gcdRec(a, b) } }

I also tried to define gce before using it, as let gcd =0 then gcd = gcdRec(a,b) , but it still the same. any idea why it's doing this?

Answer 1

give return statement in function for each condition

 let a = 6 let b = 4 var gcd = gcdRec(a, b) console.log(gcd) //this executes undefined function gcdRec(a, b) { var gcd = 0 if (a % b === 0) { gcd = b return gcd //if i used console.log(gcd) it prints correctly } else { var temp = bb = a % ba = temp if (b === 0) { gcd = a return gcd } return gcdRec(a, b) } }