Question

Consider the following code:

var emeraldGreen = true;
What variable data type does this snippet of code represent?

Answer 1

The variable named emeraldGreen is declared with the boolean data type because it is assigned the value true. In JavaScript, booleans represent logical values which can be either true or false, and they are essential for control structures like if-statements.

Step-by-step explanation:

The code snippet provided presents the declaration of a variable named emeraldGreen and assigns it the value true. In programming, particularly in JavaScript (which the syntax of the snippet suggests), the value true signifies a boolean data type. A boolean is a primitive data type that can only represent two values: true or false. These values are used to carry out logical operations commonly found in control structures like if-statements and loops.

For example, if you wanted to perform an action based on whether a certain condition is true, you could use an if-statement that checks the value of the emeraldGreen variable. If emeraldGreen is indeed true, the if-statement would execute the code within its block. Here is a simple example:

if (emeraldGreen) {
// code to execute if emeraldGreen is true
}

This boolean variable could represent a state, a condition, or a feature in a program that can be switched on (true) or off (false).