Can someone explain whats the transition from line 2 to line 3 , im new so please be patient with me

Tell us what’s happening:
where did the “is cool!” go ? Please explain the usage of ‘‘let’’ a bit more

Your code so far


const FCC = "freeCodeCamp"; // Change this line
let fact = "is cool!"; // Change this line
fact = "is awesome!";
console.log(FCC, fact); // Change this line

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Challenge: Declare a Read-Only Variable with the const Keyword

Link to the challenge:

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