Introduction to TypeScript

Introduction to TypeScript

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1. TypeScript Fundamentals

This section introduces you to TypeScript. You will learn why TypeScript is valuable and how it differs from JavaScript.

What is TypeScript?

Simple variable declaration

Mathematics in TypeScript

Typed variable declaration

Code Syntax Correction Challenge

2. Conditional Statements

We're going to take control of the code! In this section, you'll learn how to set conditions for code execution in TypeScript. You'll discover why this is used and how to use it correctly, so that your code becomes the envy of all top programmers!

Comparison Operators

if statement

If-else statement

Day of the Week Condition Execution Challenge

Complex Conditions

Challenge: Commission Calculator

3. Arrays

Let's get acquainted with a convenient way to store data in a collection of elements - an array. You will learn how to create and use arrays, as well as how to add and work with elements in an array. An important and fundamental structure for any programmer.

Declaration and Advantages of Arrays

Working with Array Elements

Challenge: Modifying Arrays

4. Loops

Automate tasks with a large amount of data or variables. Loops will assist you in this, allowing you to process a large amount of data and quickly obtain results in just a few lines of code. We will explore the fundamental types of loops and teach you how to work with them effectively!

`break` keyword

Challenge (snail game)

`for` loop with arrays

Challenge (FizzBuzz)

`forEach` method

5. Functions

It's time to finally learn how to write your own functions that will perform the operations you specify. Functions will help you organize your code, breaking it into manageable pieces and calling them in a single line. It's time to learn!

Functions introduction

Parameters and Return Statement

Challenge (lottery)

Optional Parameters

Challenge (price calculator)

Course Content

Introduction to TypeScript

if statement

It's our turn to control the code; now we will set conditions for its execution!

Let's consider the most basic form of conditional statements - the if statement.

Let's move on to the syntax:

For example:


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let amIHappy = true;
if (amIHappy) {
	console.log('I am so happy!'); 
}
console.log("It's Monday");

That's almost all there is to it, but there's one more thing worth mentioning. Inside the condition block, there should be a boolean value. However, we can also place an expression that will result in a boolean value inside this block, for example:


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let age: number = 22;
if (age >= 21) {
	console.log('You can buy alcohol');
}

You can change the value of the variable age to see how the code works depending on that value.

I'll tell you how to set a condition if the first one doesn't work in the next chapter!

Everything was clear?

Thanks for your feedback!

Section 2. Chapter 2

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