This line of code is likely written in [GDScript](https://docs.godotengine.org/en/stable/about/introduction_to_gdscript.html), the...

This line of code is likely written in GDScript, the scripting language used in the Godot game engine.

Here is what it does:

1. @export_range(0.0, 20.0, 0.1):

   • This is a decorator in GDScript used alongside the @export keyword. It specifies that the variable walk_speed can be edited in the Godot editor by users.
   • The parameters (0.0, 20.0, 0.1) define the range and step of the variable in the editor. Specifically:
     • 0.0 is the minimum allowed value.
     • 20.0 is the maximum allowed value.
     • 0.1 is the increment when adjusting the value (step size).

2. var walk_speed: float = 2.0:

   • walk_speed is a variable of type float with an initial value of 2.0.
   • This variable likely represents the speed at which a character or entity "walks" in the game.

Summary

This code creates a floating-point variable walk_speed, which starts with a default value of 2.0. Its value can be adjusted in the Godot editor within the range of 0.0 to 20.0, in increments of 0.1.