Atari 400 Users Handbooks page 203

Atari 410 Program Recorder 201
channel indicates the channel to be used to send the output.
Semicolons should be used rather than commas to separate the
channel
from the first
expression,
as well as to separate any
subsequent optional expressions. The use of commas is allowed,
but this practice would cause additional blank spaces to be
inserted in the file . Each separate expression should end with an
EOL character. This can be accomplished by using one PRINT#
statement for each expression or by using CHR$(155).
The expressions co nsist of one or more string or numeric values
to be output. These values are output as ASCII values.
Always be sure that a PRINT# statement being used to output
data to a cassette file outputs an end-of-line (EOL) character
after each expression. The PRINT# statement sends data to the
cassette buffer where it is stored until it is filled. The entire block
of data (128 bytes) is then sent to the Atari 410 .
If an EOL character is output at the end of the PRI NT# statement,
the data in the cassette buffer will be output to the cassette file ,
regardless of whether the buffer is full or not. In these situations,
the 128th character in the buffer will contain the actual number
of bytes in the buffer. This value is stored in the hex form.
PRINT# statements automatically output an EOL character after
outputting the exp ressions unless a comma or semicolon is
placed at the end of the expression list. For this reason, never
end a PRINT# statement with a comma or semicolon, when it is
being used to output data to a cassette file. An example of the
use of PRINT# is given below.
400 OPEN #2, 8,0,
"c:"
500 PRINT#2; " JOHN"
550 PRI NT#2; "JACK"
600 CLOSE #2
The PUT statement ca n be used to output a single numeric value
to the cassette file via an open channel. PUT uses the following
configu ration :
PUT
#cha nne l, numeric exp ression