Const

The const keyword is similar to let but with some key differences.

Const keyword

Const is how we declare a constant, meaning a variable that is not supposed to change. In fact, JS will throw an error if you try to change it.

Now if we tried to change the variable, we see an error:

const age = 65;

age = 30; 

If you use the const keyword, then you must set a value.

// resolve the error
const x;
 

// resolve the error
const age = 5;
age = 10;
 

Nice job! On to the next lesson.