A student runs the following code and gets ReferenceError: Can't find variable: dotSize. Which option correctly fixes the error?
function setup() {
createCanvas(300, 300);
}
function draw() {
background(220);
ellipse(150, 150, dotSize, dotSize);
}

Question

A student runs the following code and gets ReferenceError: Can't find variable: dotSize. Which option correctly fixes the error? 
 function setup() { 
   createCanvas(300, 300); 
 } 
 function draw() { 
   background(220); 
   ellipse(150, 150, dotSize, dotSize); 
 }

Answer

Move the ellipse() call into setup() instead of draw().

Answer

Nothing is wrong; the code will work as is.

Answer

Declare and assign the variable before using it: let dotSize = 50; at the top of the code.

Answer

Replace dotSize with "dotSize" in quotes.

Crowdly

A student runs the following code and gets ReferenceError: Can't find variable: ...

Want instant access to all verified answers on elearning.aua.am?