util.math.fmod

local result = util.math.fmod(
    dividend,
    divisor
)

Type	Name	Description
`float`	dividend	Number to divide
`float`	divisor	Number to divide by

Type	Name	Description
`float`	result	Remainder of `dividend/divisor` with the same sign as dividend

Remainder of integer division

local result = util.math.fmod(10, 3)

core.engine.print("info", result) -- 1.0

Remainder of float division

local result = util.math.fmod(5.5, 2.0)

core.engine.print("info", result) -- 1.5

Remainder with a negative dividend

local result = util.math.fmod(-10, 3)

core.engine.print("info", result) -- -1.0

Remainder of division by itself is zero

local result = util.math.fmod(7, 7)

core.engine.print("info", result) -- 0.0

Wrap an angle to the range -360 to 360

local angle = 450.0
local wrapped = util.math.fmod(angle, 360)

core.engine.print("info", wrapped) -- 90.0

Keep a timer looping within a period

local elapsed = 7.3
local period = 2.0
local phase = util.math.fmod(elapsed, period)

core.engine.print("info", phase) -- 1.3

Difference from the % operator on floats

local a, b = 7.5, 2.5

core.engine.print("info", util.math.fmod(a, b)) -- 0.0