Getting return undefined on recursive function javascript

Question

I heard recursive function is powerful so instead going through loop i tried to create a function which increments a number until it reach certain points. when it reaches i trie

Answer 1

The comment by vaultah is correct:

var i=1;
function rec(){
    i++;
    console.log(i);
    if(i > 100){
        return i;
    }else{
        return rec();
    }
}

snippet.log(rec());

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Let's take an example that only counts to > 5 and add some output so you can see what happens more easily (but again, stepping through the code with a debugger is the right way to see how this works):

var indent = "";
var i=1;
function rec(){
    var rv;
    i++;
    indent += " ";
    if(i > 5){
      snippet.logHTML("
" + indent + i + " > 5, returning " + i + "
");
        rv = i;
    }else{
        snippet.logHTML("
" + indent + i + " is not > 5, calling rec
");
        rv = rec();
        snippet.logHTML("
" + indent + "Got " + rv + " back from rec, returning it
");
    }
    indent = indent.substring(0, indent.length - 6);
    return rv;
}

snippet.logHTML("
Final result: " + rec() + "
");

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