Summary
This chapter covers the if statement, a fundamental control-flow construct that executes a block of code only when a boolean condition or expression evaluates to true.

General domain of usage
input validation

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:
```javascript
if (condition) {
	// code to be executed if the condition is true
}
```
For example: 

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:

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!

What will be the result of executing this code? 

Learn the most important TypeScript fundamentals for JavaScript developers. This concise course covers what TypeScript is, its syntax, how to declare variables, and how to use type annotations. Perfect for those new to typed JavaScript development and looking to quickly get started with TypeScript in modern frontend projects.

Using if Statement

Using if Statement