Boolean built-in type. Boolean is a built-in type. It can represent any data type that is either a true or false value. You can think of it as an switch with on or off (1 or 0) setting . It's often used as part of programming logic in condition statements like [code]if[/code] statements. [b]Note:[/b] In a code below [code]if can_shoot[/code] is equivalent of [code]if can_shoot == true[/code]. It is good practice to follow the natural spoken language structure when possible. Use [code]if can_shoot[/code] rather than [code]if can_shoot == true[/code] and use [code]if not can_shoot[/code] rather than [code]if can_shoot == false[/code]. [codeblock] var can_shoot = true func shoot(): if can_shoot: # Perform shooting actions here. [/codeblock] The following code will only create a bullet if both conditions are met: action "shoot" is pressed and if [code]can_shoot[/code] is [code]true[/code]. [b]Note:[/b] [code]Input.is_action_pressed("shoot")[/code] is also a boolean that is [code]true[/code] when "shoot" is pressed and [code]false[/code] when "shoot" isn't pressed. [codeblock] var can_shoot = true func shoot(): if can_shoot and Input.is_action_pressed("shoot"): create_bullet() [/codeblock] The following code will set [code]can_shoot[/code] to [code]false[/code] and start a timer. This will prevent player from shooting until the timer runs out. Next [code]can_shoot[/code] will be set to [code]true[/code] again allowing player to shoot once again. [codeblock] var can_shoot = true onready var cool_down = $CoolDownTimer func shoot(): if can_shoot and Input.is_action_pressed("shoot"): create_bullet() can_shoot = false cool_down.start() func _on_CoolDownTimer_timeout(): can_shoot = true [/codeblock] Cast an [int] value to a boolean value, this method will return [code]true[/code] if called with an integer value different to 0 and [code]false[/code] in other case. Cast a [float] value to a boolean value, this method will return [code]true[/code] if called with a floating-point value different to 0 and [code]false[/code] in other case. Cast a [String] value to a boolean value, this method will return [code]true[/code] if called with a non-empty string and [code]false[/code] in other case. Examples: [code]bool("False")[/code] returns [code]true[/code], [code]bool("")[/code] returns [code]false[/code].