Introduction to Conditionals

In life, we often perform actions based on conditions. For example: if it rains, I will take an umbrella. If I have time, I will come.

In programming, we do this using the if statement. For example:

let age = 20;
if (age > 17) { // if age is greater than 17, execute:
	console.log("You can enter");
}
// Prints: You can enter

What does an if statement consist of?

• The if keyword followed by a condition in parentheses (age > 17), which is either true or false, followed by the code we want to execute in curly braces console.log("You can enter").
• This code within curly braces is indented (either using the Tab key or four spaces).

Now let's go through the code step by step:

1. Create a variable age with a value of 20.
2. If age is greater than 17, execute the code in the curly braces.
3. age is greater than 17, so it prints You can enter.