Variables are NOT case sensitive
Booleans (true/false)
User input
key_[key on keyboard] - Is key is held
mouse_left - Is the left mouse button held
mouse_middle - Is the middle mouse button held
mouse_right - Is the right mouse button held
Player gamemode
issurvival / is_survival - Is the player in survial mode
iscreative / is_creative - Is the player in creative mode
isadventure / is_adventure - Is the player in adventure mode
isspectator / is_spectator - Is the player in spectator mode
Player movement
isgliding - Is the player flying using an elytra
isclimbing - Is the player climbing (ladder, vines, etc.)
iscrawling - Is the player crawling
isswimming - Is the player swimming
issneaking - Is the player sneaking
Other player information
isalive - Is the player alive
isblocking - Is the player blocking using a sheild
isfreezing - Is the player freezing to death (powdered snow)
isglowing - Is the player glowing
isfireimmune - Is the player immune to fire (Fire resistance)
isonfire - Is the player on fire
isonground - Is the player on the ground
isinvisible - Is the player invisible
isslime / is_slime - Is the player in a slime chunk (Always returns false if the player lacks /seed permissions)
Hudder
enabled - Yes (Hudder is enabled)
shadow - Is Hudder's shadow option selected
showinf3 - Is Hudder's show in f3 option selected
javascriptenabled - Is Hudder's javascript enabled option selected
globalvariablesenabled - Is Hudder's global variables enabled option selected
background - Is Hudder's background option selected
removegui - Is Hudder's remove gui option selected
limitrate - Is Hudder's limit rate option selected
hudhidden - Is the HUD hidden (F1)
showdebug - Is the F3 debug menu showing
Integers (Numbers)
Performance
fps - The current frame rate
avgfps / avg_fps - The average frame rate in the last few seconds
minfps / min_fps - The lowest frame rate in the last few seconds
maxfps / max_fps - The highest frame rate in the last few seconds
ping - The current ping
tps - The current Ticks per second (Client only)
gpu_d - GPU usage (with decimal point)
gpu - GPU usage (without decimal point)
cpu_d - CPU usage (with decimal point)
cpu - CPU usage (without decimal point)
delta - The time between compiles
totalmemory / maxmemory / totalram / maxram - Maximum RAM (In MB)
usedmemory / usedram - Used RAM (In MB)
freememory / freeram - Unused RAM (In MB)
usedmemory_percentage / usedram_percentage - The percentage of memory that is being used (out of the Maximum RAM supplied to Minecraft)
freememory_percentage / freeram_percentage - The percentage of memory that is being NOT used (out of the Maximum RAM supplied to Minecraft)
Computer Information
time - The number of milliseconds passed since 1st of January 1970, as supplied by the Operating System (Ex Windows, Linux, MacOS, etc.)
milliseconds - The current milliseconds time value
seconds - The current seconds time value
minutes - The current minutes time value
hour - The current hour
day - The current day of year
month - The current month
year - The current year
Food and health
saturation - The saturation of the player (not to be confused with the hunger value)
hunger - The hunger of the player
health - The health of the player
maxhealth - The maximum health of the player
Player Information
playerspeed - The speed at which the player is travelling
horizontal_playerspeed - The speed at which the player is travelling horizontally
xp - The current xp count of the player
xplevel - The current xp level of the player
selectedslot - The selected hotbar slot
Player position
dxpos / dx - The X position of the player (with decimal point)
dypos / dy - The Y position of the player (with decimal point)
dzpos / dz - The Z position of the player (with decimal point)
xpos / x - The X position of the player (Without decimal point)
ypos / y - The X position of the player (Without decimal point)
zpos / z - The X position of the player (Without decimal point)
Chunk information
chunkx - The chunk X position of the player
chunkz - The chunk Z position of the player
subchunkx - The X position of the player in the subchunk
subchunky - The Y position of the player in the subchunk
subchunkz - The Z position of the player in the subchunk
Player rotation
dpitch - The pitch (with decimal point)
dyaw - The yaw (with decimal point)
pitch - The pitch (without decimal point)
yaw - The yaw (without decimal point)
World rendering
entities - The number of entites drawn (As shown in the debug screen)
particles - The number of particles drawn (As shown in the debug screen)
chunks - The number of chunks loaded
World
light - The current light level
blocklight / block_light - The current block light level
skylight / sky_light - The current sky light level
world_time / worldtime - The current time of day
Hudder
width - The (adjusted) width of the screen
height - The (adjusted) height of the screen
guiscale - The scale of the screen (as set in the video settings)
scale - The default scale Hudder option
color - The default color Hudder option
yoffset - The y offset Hudder option
xoffset - The x offset Hudder option
lineheight - The line height Hudder option
metabuffer - The meta buffer Hudder option
backgroundcolor - The background color Hudder option
rebeccapurple - 0xFF663399,
Strings (Text)
Computer information
cpu_info - Information about the CPU (Model, Generation, etc)
operating_system - Which operating system is used
month_name - The name of the current month (WARNING: IT IS DEPENDENT ON LOCALE AND LANGUAGE, SHOULD ONLY BE USED FOR DISPLAY)
locale - The locale of the system as defined by the JVM and provided by the JVM and Operating System
language - The language of the system as provided by the JVM and Operating System (ISO 639)
country - The country of the system as provided by the JVM and Operating System (ISO 3166 2-letter code)
Player information
helditem_name - The name of the held Item
biome - The biome the player is currently inside
damagetype - The name of the most recent damage type done to the player
block_in_front - The id of the block infront of the player (upto 50 blocks)
Hudder
compilertype - The type of Hudder compiler selected
mainfile - The name of the main Hudder file