What is the difference between const and var in TypeScript?

What is the difference between const and var in TypeScript?

In TypeScript, 'var' declares a variable that can be re-assigned, while 'const' declares a constant that cannot be re-assigned.

Can you give me an example of using const?

Sure! Here's an example:

const pi = 3.14;
// pi = 3.15; // This will throw an error because pi is a constant.

What about var? How does it work?

With 'var', you can do this:

var count = 1;
count = 2; // This is allowed because count can be re-assigned.

Are there any best practices for using const and var?

Yes! It's generally recommended to use 'const' by default and only use 'var' when necessary, as 'var' has function scope which can lead to unexpected behavior.