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javascriptecmascript-6terminology
James Marks
James Marks

Reputation: 371

What is the term to describe the keywords let, const and var?

When teaching, it helps to have a common set of terms to describe categories of things to facilitate comprehension. Before let and const, I could just call var, "the var keyword"...

Now we have 3 keywords that are used to declare a variable: var, let and const.

I've done a few searches and still can't find an answer: Is there a categorical name to describe these three keywords separately from any other?

Thanks all!

Upvotes: 4

Views: 316

Answers (1)

Paul
Paul

Reputation: 141827

They are each the first token of a declaration statement, so you could call them "declaration keywords".

However, it's worth noting that let is not actually a keyword at all. EG.

var let = 5;
console.log( let );

is perfectly valid outside strict-mode, but since const and var are keywords, these are not allowed:

var const = 5;
var var = 5;

Upvotes: 5

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