Variables are an important concept in programming,
they are pieces of data that you can define, read, and change the value of
when storing information. Variables can be thought of as boxes, with a name
At any time we can find the box from its name and use the value in the box.
There are different types of variables but the main ones are:
Whole numbers (1, 2, 3) (integer)
Decimal numbers (0.1, 2.7, 3.6) (float)
Text (“Hello World”) (String)
Booleans (True / False) (bool)
To create a variable in GD Script, we first need to define it. When programming, we write the
variables at the top of the script, so we will define all our variables below the extends Node2D line.
To define a variable we will write the keyword var to specify this is a variable. This will be
followed by the name of the variable (eg: score), a colon and then the data type of the variable, then an equals sign, and then the default value of the variable, which we will use a value of 0.
Eg: var varName: dataType = value
To test a variable, we can log the value to the game’s output.
To do this we will use the _ready function. We will discuss functions later on.
For now, just know functions are blocks of code that can be called at any time.
The _ready function will be called at the start of the game.
In the function, we will replace the pass line with our own code
to print out the name variable.
Click the Run Current Scene button
If you change the value of the variable and run the scene again,
you will see the output has changed.
