The write keyword writes its operand on the standard output. This can
be useful for debugging or displaying progress information. The write
keyword acts as a expression terminator (like the assignment operator) and
so must always appear at the end of an expression.
The read keyword reads from the standard input characters up to a
newline, returning the string entered (including the newline character).
The maximum number of characters that can be read is STRMAX. Since
it returns a value it can be used anywhere in an expression.
The send keyword will write its operand to the output file stream
(as opposed to write which sends its output to standard output). This
is useful for writing larger blocks of text generated from equates that
cannot be written into the output file in the ordinary way (by returning
the value). Like the write keyword it acts as an expression terminator.
Here is an example of the read, write and send operators.
%%EQUATE feedback read >> s "Input: " + s write s send
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