Don't Subtract Global Value Below Zero

Hi Construct Community,

How do I make a global number variable only natural numbers (0,1,2,3....) and exclude negative numbers? I'm making an ammo system, and I don't want the ammo count to go below zero.

Thanks.

Enclose it in ABS(variable)

from the manual:

abs(x) Absolute value of x e.g. abs(-5) = 5

Or you might want Clamp(), or Max()

Clamp locks it to a range, CLAMP(variable,0,200)

or Max picks the highest number, MAX(Variable,0)

wut

How would I enclose it?

Only subtract whole numbers from your Ammo_Total global variable. Then have an every tick sub-event somewhere convenient:

If Ammo_Total < 0 then Ammo_Total = 0.

Edit - I see I'm too slow at typing again...!

or if you don't understand the above suggestion, you can just make a simple event like if variable is less then 0 set value to 0

Use compare two values instead of compare Global Variable. You can enter the variable there with the function and parentheses around it.

Edit - I see I'm too slow at typing again...!

Me too!

Thanks everybody, I used Colludium's solution and it works like a charm.

awmace5

You also have the option and my growing favorite.

CLAMP( newvalue, minimum, maximum )

example:

Action: set global variable ammo with the line clamp( ammo - 1, 0, 100)