Functional Programming - Avoid Mutations and Side Effects Using Functional Programming

JavaScript
1

Tell us what’s happening:
Describe your issue in detail here.
Just wondering why the increment operator (++) did not change the fixedValue variable from 4 to 5? According to the hints it should but when I console.log it it still shows 4?

Your code so far

// The global variable
let fixedValue = 4;

function incrementer() {
  // Only change code below this line
return fixedValue ++;

  // Only change code above this line
}
let result = incrementer();
console.log(result);

Your browser information:

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Challenge: Functional Programming - Avoid Mutations and Side Effects Using Functional Programming

Link to the challenge:

2

In did change the value. But the old value was returned first. Prefix vs postfix has different behavior

3

Oh I see, thanks now I understand.