What's a Condition?

Suppose we want to write a program that asks the user to enter a number and then displays a message if the number is positive. Here is the corresponding algorithm.

Enter a number
		If the number is positive
    		Display a message

The message should display only if the number is positive; this means it’s “subject” to a condition.

The if statement

Here’s how you translate the program to JavaScript.

The console.log(...) ...