--description--

To declare a constant (unchanging) variable, use const instead of let:

const myBirthday = '16-09-2003';

Variables declared using const are called "constants". They cannot be reassigned. An attempt to do so would cause an error:

const myBirthday = '16-09-2003';

myBirthday = '01-01-2001'; // error, can't reassign the constant!

When a programmer is sure that a variable will never change, they can declare it with const to guarantee and communicate that fact to everyone.

--questions--

--text--

What is the result of attempting to reassign a const declared variable in JavaScript?

--answers--

The reassignment succeeds with no errors.

An error is thrown because const declared variables cannot be reassigned.

JavaScript silently ignores the reassignment.

The variable type is automatically changed to let.

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