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JavaScript JavaScript Foundations Variables Hoisting

Posted by Reagan Schiller
Reagan Schiller
10,072 Points

help with challenge

can't figure out how to code this challenge. when I define the status in the if block i am told to put it at the top, when i put it at the top I am told to put it in the if block, when i put it in both it tells me I should only enter it once.

2 Answers

Dave McFarland
STAFF
Dave McFarland
Treehouse Teacher
Dave McFarland
Dave McFarland
Treehouse Teacher

Hi Reagan Schiller

Check out this discussion on the same code challenge: https://teamtreehouse.com/forum/hoisting-objective

In general, you want to declare a variable with the var keyword at the top of a function, even if you don't set the value of the variable until later in the function:

function myFunction(y) {
  var x;
  if ( y === true ) {
    x = true; 
  } else {
    x = false;
  }
  return x;
}
Adam Moore
Adam Moore
21,956 Points
Adam Moore
Adam Moore
21,956 Points

You might need to declare your variable at the top inside the if statement, so that the first line of code inside of the if function (after the first curly bracket) is the variable declaration. So instead of using a 'y' variable like:

var x=2;
if(x=2){
x=x+1;
y=2;
return x+y;
}

You may need to declare it like this (which I'm pretty sure is what Javascript does when it compiles the code):

var x=2;
if(x=2){
var y;
x=x+1;
y=2;
return x+y;
}