The readonly modifier in TypeScript

With the readonly modifier, properties can be made read-only. Let's look at an example. Let's make the User class property name read-only:

class User {
	readonly name: string;
	
	constructor(name: string) {
		this.name = name;
	}
}

Let's create an object of the class, assigning some value to the name:

let user: User = new User('john');

Let's read the meaning of the name:

console.log(user.name); // 'john'

But trying to write a different value to the property will result in an error:

user.name = 'eric'; //

Give the User class a read-only property age. Create an object of this class and print its age to the screen.