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Exercise:

Prevent the array from being changed:

const names: readonly string[] = ["Dylan"];

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const names: w3exercise_input_no_0
 string[] = ["Dylan"];

Completed 0 of 30 Exercises:

TypeScript Introduction

Exercise 1 Exercise 2 Go to TypeScript Introduction Tutorial

TypeScript Get Started

Exercise 1 Go to TypeScript Get Started Tutorial

TypeScript Simple Types

Exercise 1 Exercise 2 Exercise 3 Go to TypeScript Simple Types Tutorial

TypeScript Special Types

Exercise 1 Exercise 2 Go to TypeScript Special Types Tutorial

TypeScript Arrays

Exercise 1 Go to TypeScript Arrays Tutorial

TypeScript Tuples

Exercise 1 Exercise 2 Go to TypeScript Tuples Tutorial

TypeScript Object Types

Exercise 1 Exercise 2 Go to TypeScript Object Types Tutorial

TypeScript Enums

Exercise 1 Exercise 2 Go to TypeScript Enums Tutorial

TypeScript Aliases & Interfaces

Exercise 1 Exercise 2 Exercise 3 Go to TypeScript Aliases & Interfaces Tutorial

TypeScript Union Types

Exercise 1 Go to TypeScript Union Types Tutorial

TypeScript Functions

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Go to TypeScript Functions Tutorial

TypeScript Casting

Exercise 1 Exercise 2 Go to TypeScript Casting Tutorial

TypeScript Classes

Exercise 1 Go to TypeScript Classes Tutorial

TypeScript Basic Generics

Exercise 1 Go to TypeScript Basic Generics Tutorial

TypeScript Utility Types

Exercise 1 Exercise 2 Exercise 3 Go to TypeScript Utility Types Tutorial