Places

expression<location> offset by <x>, <y>, <z>since 1.7.0

The place that far away

teleport player to player's location offset by 0, 10, 0

expressionlocation above <location> / location below <location>since 1.7.0

One block up or down

set block at location below player's location to stone

expressionlocation <n> blocks in front of <who>since 1.7.0

Where they are looking, that far away

set {_ahead} to location 3 blocks in front of player

expressionlocation <n> blocks behind <who>since 1.7.68

That far behind them, on the level, from where they stand. location behind <who> is one block

set {_spot} to location 2 blocks behind player
summon zombie at {_spot}

expressionlocation <n> blocks left of <who>since 1.7.68

That far to their left, likewise; right of for the other side, and location left of <who> is one block

set {_spot} to location 3 blocks left of player
place stone at {_spot}

expressionmidpoint between <a> and <b>since 1.7.0

Halfway between two places

set {_middle} to midpoint between {arena.corner1} and {arena.corner2}

expressionhighest block at <location>since 1.7.0

The top block of that column, as a location

teleport player to location above highest block at player's location

expressionbiome at <location>since 1.7.0

The biome's name, e.g. plains

send "&7Biome: &f" + biome at player's location

expressionlight level at <location>since 1.7.0

0 (dark) to 15 (bright)

if light level at player's location < 8:
    send "&7Mobs can spawn here."

expressiontarget block of <who>since 1.7.0

The block they are looking at, up to 100 blocks away, as a location

set {_looked} to target block of player
if {_looked} is set:
    strike fake lightning at {_looked}

expressionblock (below/above) <who>since 1.7.45

The kind of block under their feet, or over their head, such as gold_block. A location works in place of a player: the block one lower or higher

on player jump:
    if block below player is "slime_block":
        push player upward with force 2

expressionvehicle of <who>since 1.7.45

What they are riding, as a creature; unset if they are on foot

set {_mount} to vehicle of player

condition<location> is within <n> blocks of <location>since 1.7.0

A condition

if player's location is within 10 blocks of {spawn}:
    send "&aYou are near spawn."

condition<location> is loadedsince 1.7.0

Whether that part of the world is loaded

if {arena} is loaded:
    summon zombie at {arena}

Guide and examples

Ways to get from one location to another, and to ask about one.

on player sneak:
    set {_ahead} to location 3 blocks in front of player
    if block at {_ahead} is "air":
        set block at {_ahead} to stone

Syntax	Result
`<location> offset by <x>, <y>, <z>`	The place that far away
`location above <location>` / `location below <location>`	One block up or down
`location <n> blocks in front of <who>`	Where they are looking, that far away
`location <n> blocks behind <who>`	That far behind them, on the level, from where they stand. `location behind <who>` is one block
`location <n> blocks left of <who>`	That far to their left, likewise; `right of` for the other side, and `location left of <who>` is one block
`midpoint between <a> and <b>`	Halfway between two places
`highest block at <location>`	The top block of that column, as a location
`biome at <location>`	The biome's name, e.g. `plains`
`light level at <location>`	0 (dark) to 15 (bright)
`target block of <who>`	The block they are looking at, up to 100 blocks away, as a location
`block (below/above) <who>`	The kind of block under their feet, or over their head, such as `gold_block`. A location works in place of a player: the block one lower or higher
`vehicle of <who>`	What they are riding, as a creature; unset if they are on foot
`<location> is within <n> blocks of <location>`	A condition
`<location> is loaded`	Whether that part of the world is loaded

Coordinates can be written out wherever a line ends with a place: set {spawn} to 0, 64, 0 in "world".