Hi Rui,

well done for finishing the lab!

let's look at an example regarding your question:

let characters = "Abc";
console.log(characters)
// output => "Abc"
characters = "def"
console.log(characters)
// output => "def"

in this case you are reassigning a new value to the variable
however with += you are adding to the variable instead

let characters = "Abc";
characters += "def"
console.log(characters)
// output => "Abcdef"

so characters += "def" is essentially the same as
characters = characters + "def" only shorter

So in relation to the lab:
In each iteration of the for loop you are adding to the variable navigatorName character by character hacker2[i].

Hope this helps,
Paula :)

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