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JavaScript JavaScript Foundations Functions Scope

daniwao
daniwao
13,125 Points
Posted by daniwao
daniwao
13,125 Points

Global scope variable question

I'm not sure why I'm getting an error in this code challenge. It's asking me to make a global variable where x = 1;

Here's my code below. 

  x = 1;
  var y = 1;

  function hypotenuse(a , b) {
    var cSquared = a * a + b * b;
    x = ;
    x = Math.sqrt(cSquared);
    return x;
  }

  hypotenuse(x, y);

3 Answers

Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

Hi Dan,

This was the starter code for this:

var x = 1;
      var y = 1;

      function hypotenuse(a , b) {
        var cSquared = a * a + b * b;
        x = Math.sqrt(cSquared);
        return x;
      }

      hypotenuse(x, y);

The instructions are asking you to make sure that changing x inside the function doesn't change the global x at the top. In other words, you need to declare x as a local variable inside that function so that changes to x inside the function don't affect the x that is global at the top.

var x = 1;
      var y = 1;

      function hypotenuse(a , b) {
        var x;
        var cSquared = a * a + b * b;
        x = Math.sqrt(cSquared);
        return x;
      }

      hypotenuse(x, y);
jase richards
jase richards
10,379 Points
jase richards
jase richards
10,379 Points

By the looks of it x isn't declared as a variable You have var y = 1; But no var for the x

Chris Shaw
Chris Shaw
26,676 Points
Chris Shaw
Chris Shaw
26,676 Points

Hi dan,

You appear to be missing the var keyword from your first line which currently just says x = 1; which will fail as the test is looking for var first.

Also x = ; will fail as you can't assign nothing to a variable.