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JavaScript JavaScript Foundations Functions Scope

Harry James
Harry James
14,780 Points
Posted by Harry James
Harry James
14,780 Points

Can't set x to 1 in Global Scope?

Hello,

I have the question

When the 'hypotenuse' function is called the value of 'x' changes from 1. Fix it so that 'x' is still 1 in the global scope.

However, I, for some reason can not set x to 1 in the Global Scope.

Here is the program I have written:

      var x = 1;
      var y = 1;

      function hypotenuse(a , b) {
        var cSquared = a * a + b * b;
        x = 1;
        return x;
      }

      hypotenuse(x, y);

However, I get the error message: Bummer! Exepcting the return value of hypotenuse(1,1) to be 1.4142135623730951 but got 1 So, if I set x to the value of 1.4142135623730951, I then get the error message The global variable x was 1.4142135623730951 not 1

Any help would be appreciated.

2 Answers

Dino Paลกkvan
Dino Paลกkvan
Courses Plus Student 44,108 Points

You're not supposed to change the value of x in the global scope. It's already 1. You have to make the x variable inside the function a local variable.

To achieve that, the only change you have to do in the challenge is add the keyword var in front of x on line 22.

Harry James
Harry James
14,780 Points
Harry James
Harry James
14,780 Points

Ah, I got confused by the "so that 'x' is still 1 in the global scope" in the question. That makes sense now, thanks for explaining.

ilyass mougar
PLUS
ilyass mougar
Courses Plus Student 2,858 Points
ilyass mougar
ilyass mougar
Courses Plus Student 2,858 Points

Try this is true 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);