----------------------------------
Simple variable assigment
----------------------------------
x := 10,
y := 20,
say x,
say y,

x = 30,
say x,
say y,

x = y,
say x,
say y,

----------------------------------
Array updates
----------------------------------
array := flat 1 2 3,
say array,

array = update array 1 10,
say array,

array = update array 1 (array.2),
say array,