Conditionals

Introduction:

In any programming language, the code needs to make decisions and carry out actions accordingly depending on different inputs.

For example, in a game, if the player's number of lives is 0, then it's game over.
In a weather app, if it is being looked at in the morning, show a sunrise graphic; show stars and a moon if it is nighttime.

In this lesson, we'll explore how conditional statements work in JavaScript.

What are the conditional statements?

Conditional statements are used to decide the next action based on a condition.

If a condition is true, you can perform one action and if the condition is false, you can perform another action.

The IF statement:

We use the if statement to specify a block of JavaScript code to be executed if a condition is true.

Basically, the if(...) statement evaluates a condition in parentheses and, if the result is true, executes a block of code.

For example:

Let's do an example activity:

CHALLENGE:

Modify the program to check if the user is 21 years old or older. If the condition is true, display a message that says "You can vote."
If the user is under 21 years old, display a message that says "You cannot vote yet."

Lesson 2: Conditionals - IF Statement