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javascriptmethodsinclude

Output works and get "undefined" value too

I've this little code:

var mobili='mqihfdbacegklnprtuz&xyso';
function encrypt(index){
 if(mobili.includes(index)){
   var test = "It's working";
   console.log(test)
 }
 else{
   var test = "Bueller? Bueller?";
   console.log(test);
 }
}
console.log(encrypt('j'));

So... This code works but the output get to me the "undefined" value too. Why?

enter image description here

PS: I'm in repl.it website to run this one.

Solution

  • Your function isn't returning anything - it's actually calling console.log itself. You can fix this in two ways:

    One: Add a return statement to your function instead of using console.log:

    function encrypt(index){
 if(mobili.includes(index)){
   var test = "It's working";
 }
 else{
   var test = "Bueller? Bueller?";
 }
 return test;
}

    Two: Call the function without using console.log:

    encrypt('j');