What is this syntax called?

Question

JavaScript

const a = () => {
  return 1;
}

And how to get 1 in this case? After all, the call
console.log(a);
Displays:

() => {
  return 1;
}

Answer 1

What? This is not an assignment to a variable, but a declaration of a function a that returns 1
a()will print 1 to the console.
This is equivalent to this code:

function a () {
  return 1;
}

PS - it's called "arrow functions"