III. g] Hello buttons!

Buttons play a vital role in games. Without buttons games would be dull or just a video(Like many virtual reality games that do not accept user input). Lets face it, even smartphones have buttons, at least touch, and knowing how to use them would make our homebrew apps far more fun. The definitions of buttons in CTRULIB are:

KEY_A
KEY_B
KEY_X
KEY_Y
KEY_L
KEY_R
KEY_DUP
KEY_DDOWN
KEY_DRIGHT
KEY_DLEFT
KEY_DTOUCH(Doesn't really handles touch)

best used in 'if' and 'else' statements and are always after:

hidScanInput();
u32 kDown = hidKeysDown(); //hidKeysDown returns information about which buttons have been just pressed (and they weren't in the previous frame)
u32 kHeld = hidKeysHeld(); //hidKeysHeld returns information about which buttons have are held down in this frame
u32 kUp = hidKeysUp(); //hidKeysUp returns information about which buttons have been just released