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In this lesson, we take a first look at variables.

In games, you need to keep track of many values that change over time:

- The player's score.
- Every character or enemy's health.
- The last checkpoint.

And so much more. You need to store, retrieve, and update those values.

We call those values [i]variables[/i]. Variables are labels you use to keep track of values that vary over time. Here's an example of a variable tracking a character or monster's health.
The line above defines a new variable named [code]health[/code] and assigns it a starting value of [code]100[/code] (that's what the equal sign does, more on that below).

Function parameters, which you saw in the previous lesson, are another example of variables.
In this lesson, we start using variables built into Godot. They're a particular kind called [i]member variables[/i].

Member variables are values attached to a game entity. They're useful properties like the [code]position[/code], [code]rotation[/code], and [code]scale[/code] of a character.

In a previous lesson, we saw how we could use the [code]rotate()[/code] function to rotate our character.
This function increases or decreases the value of the entity's [code]rotation[/code] member variable.

Say we want to reset the rotation to [code]0[/code] and make the character upright. Using the [code]rotate()[/code] function can prove difficult: you need to know the character's exact current angle to cancel it out.

It's much easier to use the member variable rather than the function.

The following code assigns the value [code]0[/code] to the character's rotation, resetting its angle and making it upright.
Notice how we use the equal sign ([code]=[/code]) to change the value of a variable.
What's a variable?
Variables are labels you use to access values that change over time.

You can also use them to put a name on a value you want to reuse throughout your code. It makes your code easier to read and to change.
A label you use to keep track of a value that can change.

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  1. Learn GDScript From Zero
  2. lesson-7-member-variables
  3. English
In this lesson, we start using variables built into Godot. They're a particular kind called [i]member variables[/i].

Member variables are values attached to a game entity. They're useful properties like the [code]position[/code], [code]rotation[/code], and [code]scale[/code] of a character.

In a previous lesson, we saw how we could use the [code]rotate()[/code] function to rotate our character.
In this lesson, we start using variables built into Godot. They're a particular kind called [i]member variables[/i].

Member variables are values attached to a game entity. They're useful properties like the [code]position[/code], [code]rotation[/code], and [code]scale[/code] of a character.

In a previous lesson, we saw how we could use the [code]rotate()[/code] function to rotate our character.
2 years ago
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course/lesson-7-member-variables/lesson.tres:56
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lesson-7-member-variables.pot, string 3