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{{:Eng:Key () Pressed? (block)/translate}}
{{redirect|Key () Pressed||Key Pressed (disambiguation)}}
{{block
|name = Key () Pressed?
|image = key (space v) pressed?
|category = [[Sensing Blocks|Sensing]]
|type = [[Boolean Block|Boolean]]
|default = space
|sb = yes
}}The '''Key () Pressed?''' [[Blocks|block]] is a [[Sensing Blocks|Sensing block]] and a [[Boolean Block|Boolean block]]. The block checks if the specified key is pressed. If the key is being pressed, the block returns ''"true"''; if it is not, it returns ''"false"''.
[[File:Key () Pressed Drop-Down.PNG|thumb|right|Part of the drop-down menu for the block.]]

The keys available to be used in this block include the entire English alphabet ( {{key press|a}} {{key press|b}} {{key press|c}} etc.), the number keys ( {{key press|0}} {{key press|1}} {{key press|2}} etc.), the arrow keys ( {{key press|left}} {{key press|up}} {{key press|right}} {{key press|down}} ), and the {{key press|space}} key. In the [[Experimental Viewer]], the {{key press|enter}} key could also be chosen. After an update, this block now includes an {{key press|any}} option, which allows one to press any key to operate the block.

==Example Uses==
As this block checks if a key is being pressed or not, it is useful for controlling objects, especially with [[One Sprite One Script Projects]]. If the [[project]] requires key input, this block can be used to serve as a replacement for the [[When () Key Pressed (Events block)|When () Key Pressed]] block. The [[Hat Block|Hat block]] cannot be used in the middle of a script.

Some common uses for the Key () Pressed? block:
* Controlling a character
<scratchblocks>
forever
if <key [down arrow v] pressed?> then
change y by (-10)
end
if <key [up arrow v] pressed?> then
change y by (10)
end
if <key [left arrow v] pressed?> then
change x by (-10)
end
if <key [right arrow v] pressed?> then
change x by (10)
end</scratchblocks>
* Word processors
* Moving objects
* Changing slides in slideshows or changing what characters say
<scratchblocks>
say [Hello!]
wait until <key [any v] pressed?>
wait until <not <key [any v] pressed?>>
say [Welcome to my game!]
</scratchblocks>

==Sensing Scrolling==
The [[When () Key Pressed (Events block)|When () Key Pressed]] block, the counterpart to the Key () Pressed? block senses the scroll wheel as well as the up/down keys.
Combining these two blocks, it is possible to sense when somebody is using the scroll wheel. The following script is one way of doing this.
<scratchblocks>
when [up arrow v] key pressed
if <not <key [up arrow v] pressed?>> then
 . . .
</scratchblocks>
The action is done when the scroll wheel is scrolled up. If the key pressed blocks are changed to the down arrow, it will sense when it is scrolled down.

==Detecting More Keys==
{{main|Additional Keys}}
This block has the ability to detect keys that are not available in the dropdown menu. This can be done by inserting a block which reports a key's name into the dropdown:
<scratchblocks>
<key (join [KEY NAME] []) pressed?>
</scratchblocks>
Alternatively, a variable can be inserted into the dropdown:
<scratchblocks>
<key (var) pressed?>
</scratchblocks>
{{note|This does not work with keys such as the {{kp|Ctrl}}, {{kp|Alt}}, {{kp|Tab}}, {{kp|Backspace}}, and {{kp|Shift}}, although it does work with {{kp|enter}}.}}

==Suggestions==
There are four somewhat popular suggestions related to this block:
* Add more keys<ref>[[topic:33571]]</ref>
* Make a [[Reporter Block|reporter block]] that says which keys are being pressed down. It would look like: <sb>key pressed::sensing reporter</sb><ref>[[topic:53826]]</ref>
* Make this a [[Stage Monitor]]
* Allow variables to replace the drop down (already done in Scratch 3.0<ref>[[topic:384167]]</ref>)

Some [[Scratch Modifications]] have at least one of these.

==See Also==
* [[Number Pad Detection]]
* [[Sensing Blocks]]
* [[Key () Pressed? (block)/Enabling Dropping|Enabling Dropping]]
* [[Boolean Block]]

==References==
<references/>

{{Sensing Blocks}}

[[Category:Sensing Blocks]][[Category:Boolean Blocks]]
[[de:Taste () gedrückt? (Block)]]
[[ja:() キーが押された (ブロック)]]