Sends a string to the process standard output stream
followed by an "end of line" sequence.
Parameters:
arg1 -
The object to be written. It may be either a string, integer,
float or boolean object.
Returns:
The number of arguments that were received.
Sends to the process standard output stream the string obtained
by concatenating the arguments that were received. If an argument
is a numeric object then the string containing its decimal
representation is used.
