F_Rand returns a random number
not a random item nor a random count
and float is not valid for rathena script language
so ifyou want to use the function , it's like this
.@id = callfunc ("F_Rand", 603,617,503,502);
getitem .@id,1;
so it would be random from these set of numbers
//////////////////////////////////////////////////////////////////////////////////
// Returns a random argument.
// -- callfunc "F_Rand",arg0,arg1,...
// Example:
// // You can use it to pick a random number from a list:
// set @itemIDfromList, callfunc("F_Rand",1129,1222,1163,1357,1360,1522,1811,1410);
//////////////////////////////////////////////////////////////////////////////////
function script F_Rand {
return getarg(rand(getargcount()));
}