What will the last call print?

const name = 'Tirion';
console.log(name.toUpperCase()); // => TIRION
console.log(name); // => ?

The answer to this question depends on how well you understood the lesson about the immutability of primitive data types. Calling the .toUpperCase() method returns a new value with all letters converted to uppercase but doesn't (and can't) change the original string. So the constant (or variable, it doesn't matter here) will contain the original 'Tirion' value. This logic holds true for methods of all primitive types. Moreover, attempting to change the value of a property of this data will lead to nothing:

const name = 'Tirion';
console.log(name.length); // => 6
name.length = 100;
console.log(name.length); // => 6

You can replace the value with a new one instead of changing it. This requires variables:

let name = 'Tirion';
name = name.toUpperCase();
console.log(name); // => TIRION

User input data often contains extra spaces at the end or beginning of a string. They are usually cut out with .trim(), for example, ' hello\n ' becomes 'hello'. Update the firstName variable by assigning the same value to it, but using the .trim() method. Print the result.