Usage:

--x (pre-decrement), x-- (post-decrement)

The pre-decrement has the value of x - 1, and subtracts 1 from x.

The post-decrement has the value of x, and then subtracts 1 from x.

var/x = 1
world.log << --x // 0
world.log << x-- // 0
world.log << x // -1
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