Why? 4

Question

What is the output of this code?
function f(x)
{ if(x==4)
return 4;
else
return f(x+1); }
alert(f(1)); answer 4

Answer 1

That is a recursive function that takes a number as an argument. The else statement is the recursive case while the if statement is the base case.

For every recursive call, the argument passed is increased by 1 until it reaches 4 and that makes the base case true, thus returning the value 4.

Answer 2

Based on the only constant return in the function, 4 is the only feasable and possible answer.