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Learn if statement | Conditional Statements
Introduction to TypeScript

book
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:

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");
12345
let amIHappy = true; if (amIHappy) { console.log('I am so happy!'); } console.log("It's Monday");
copy

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

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!

question mark

What will be the result of executing this code?

let ticket = 50;
if (ticket > 50) {
console.log('You just won the lottery!');
}

Select the correct answer

Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 2. Chapter 2

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