Functions

From ZDoom Wiki

Functions are - like scripts - an arbitrary number of sequenced commands. Unlike scripts, functions are identified by a name and can be easily called from anywhere in your scripts or other functions. They can also return a value to the calling script or function. You can place functions anywhere in your script file.
Note: you can not use latent functions (Delay) in your functions.

Functions have to be defined like this:

function type function_name([type arg1 [, type arg2 [...]]])
{
	// function body

	return value;
}

• type - variable type the function will return. Use void to not return anything
• function_name - the name of the function. It is used to execute the function. Note that function names may not contain blanks
• type argx - type is the variable type of the argument. argx is the name of the variable as which it is used in the function
• return - optional. The function will return this value

Example:

#include "zcommon.acs"

script 1 open
{
	int ret;
	
	ret = square(3);
	
	print(s:"the square of 3 is ", d:ret);
}

function int square(int val)
{
	return val * val;
}