How do you set a variable to decrease by 1 each tick without dropping below zero?

Question

I would like to know how to write a piece of code that causes "excitation" to decrease by 1 each tick without dropping below zero in Netlogo.

So far I have come up with this:

set excitation - 1

Answer 1

Do you mean like this decrement-counter with the condition, "if excitation > 0"?

globals [ excitation ]

if excitation > 0 [
set excitation excitation - 1
]