Comparisons

Comparison functions test one variable against either an integer literal or another variable. They return a boolean function result and also update the stdout: boolean helpers.

function var:comp/eq { k: "score", v: 10 }
execute if function stdout:true run say score is 10

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Functions

Function	Test
var:comp/eq	k == v
var:comp/gt	k > v
var:comp/gteq	k >= v
var:comp/lt	k < v
var:comp/lteq	k <= v

Each function accepts:

Argument	Type	Description
k	string	Variable name to test
v	int or string	Integer literal or another variable name

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Branching

The most reliable branch pattern is to run the comparison first, then branch with stdout:true or stdout:false.

function var:comp/gteq { k: "coins", v: 100 }
execute if function stdout:true run say enough coins
execute if function stdout:false run say not enough coins

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Reusing the result

Since the result remains in mcfstd's boolean register until another boolean function overwrites it, you can branch several times after one comparison.

function var:comp/lt { k: "health", v: 1 }

execute if function stdout:true run say player is down
execute if function stdout:false run say player is still standing

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Variable operands

If v names an existing variable, the comparison uses that variable's value.

function var:set { k: "current_wave", v: 4 }
function var:set { k: "final_wave", v: 5 }

function var:comp/lt { k: "current_wave", v: "final_wave" }
execute if function stdout:true run say more waves remain

If v is not an existing variable, mcfstd treats it as an integer literal.

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Result state

Comparison functions write their result to the internal boolean register _std_a in _reg.

Result	Register state	stdout:true	stdout:false
true	_std_a = 1	returns true	returns false
false	_std_a = 0	returns false	returns true

Calling another comparison or var:isset overwrites this state.