JavaScript-Constant
In Variable Initial value we can change later.
Interest Rate = 1;
Console.log(Interest Rate);
Resigned variable value to 1.
So, in console It will not display 0.3. It will display
interest Rate as 1
In real world applications sometimes, we don’t want value
of the variable to change. Because otherwise it going to create all kind of
bugs in your application in those situation. Instead of variable we use constant.
Instead, of let we use const. So, the value of the variable as the name
implies can change. But the value of the constant cannot change. So, change let to const
const InterestRate
= 0.3;
Interest Rate = 1; Reassigned value console.log
(interest rate); So, after saving if you check console, it will show
error (uncaught type error; Assignment to constant
variable) with line number of error other, so we cannot reassign the
constant value.
so here is a best practice if you don’t like to reassign the
value Constant (const) is your default choice Otherwise, if you need to
reassign the value, then use variable (let).