Difference between const and let

#1

In this lesson we don’t learn the real difference between const and let. Or am I missing something?

1.

Below the two existing arrays, re-assign the element in index 0 of condiments to 'Mayo' .

Log the updated array, condiments , to the console.

Stuck? Get a hint

2.

Below your code from Step 1, reassign condiments to be a new array that contains a single string ['Mayo']

Log the result to the console.

Notice that you can re-assign elements in an array and re-assign an entire new array to a variable declared using the let keyword.

Stuck? Get a hint

3.

Below your code from Step 2, re-assign the last item from the utensils array to 'Spoon' .

Log the updated array to the console.

FAQ: Arrays - Arrays with let and const
#2

can be, what is still unclear at this point?

#3

I’ve added extra code at the end to test the real difference (so you get an error)

utensils = ['Mayo'];
console.log(utensils);
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#4

That is a good mindset for a programmer, testing a theory by producing an error (when you expect one)

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#5

…thanks, I think it should be in the lesson.

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#6

I agree - I think it should be added the lesson in order further clarify the difference between let and const when declaring arrays. Otherwise, the difference is not actually seen.

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#7

There isn’t that much difference, the variable is either constant or its not. The only difference is that we can mutate the array (because its mutable data)

#8

10 posts were split to a new topic: Difference between const and let not explained