GameMonkeyScript/gmsrc/doc/tutorial/1-intro/scripts/scoping_2.gm

// Create a variable in the global scope
global myvar = 100;

// parameter 'a_param' is in function local scope
myfunc = function( a_param )
{
	// Access variable myvar in global scope
	global myvar = a_param;
	print( myvar );
};

print( myvar );
myfunc( 50 );
print( myvar );