Problem understanding challenge question

Question

Hello, could someone help me understand this code:

function fib(num) {
if(num <= 2) {
return 1;
}

return fib(num - 1) + fib(num - 2);
}

document.write(fib(6));

In this code, is the function actually calling itself until the condition is true? Why is the actual result 8? Thanks in advance.

Answer 1

https://youtu.be/VtG0WAUvq2w have a look at this .. after that you will be able to solve it by yourself 🙂 .. leme know if you need further help.

Answer 2

if num<=2 return 1, so fib(1) = 1, fib(2) = 1

now:

fib(3) return fib(2)+fib(1) = 1+1 = 2

fib(4) return fib(3)+fib(2) = 2+1 = 3

fib(5) return fib(4)+fib(3) = 3+2 = 5

fib(6) return fib(5)+fib(4) = 5+3 = 8

Answer 3

Thanks a lot for your help, Prashanath! I will look the video