Virtually the same as solution but not working

[gtrman97]

freeCodeCamp.org

So I wrote:

// The global variable
var fixedValue = 4;

function incrementer () {
  // Only change code below this line
  return fixedValue++;
  // Only change code above this line
}
var newValue = incrementer(); 
console.log(fixedValue); 

[JeremyLT]

The entire purpose of this challenge is to avoid side effects. The ++ operator changes the value stored in the variable, which is a side effect.

To see this, try calling the function twice. You should get the same number out each time, but your code won’t do that - it will provide two different values.

[gtrman97]

So I am to understand that

fixedValue++

and

fixedValue + 1

cause two different things?

[JeremyLT]

Yes. The first changes the value stored in the variable. The second does not.