Modular Math Operator. BINARY
Removes two values from the stack. Performs modular arithmetic on the two values, placing the result onto the stack.
351 69 mod
is the same as (351 mod 69), which is 6. Thus "351 69 mod" is equivalent to writing "6".
Mod allows a user to check whenever a given value is a multiple of a specific number. Ie.
cond *.robage 5 mod 0 = start 'do something every 5 cy's stop
This particular code allows a bot to essentially set an action to activate every 5 cycles.
In versions before 2.4, you cannot do maths in conditions. You can however, use the stack to the same effect:
cond start *.robage 5 mod stop cond 0 = start 'do something every 5 cy's stop