Writes one character to the screen or to an open file
(write-char num [file-desc])
The decimal ASCII code for the character to be written.
A file descriptor for an open file.
The num argument.
The following command writes the letter C to the command window, and returns the supplied num argument:
Command: (write-char 67)
f is the descriptor for an open file, the following command writes the letter C to that file:Assuming that
Command: (write-char 67 f)
write-char cannot write a NULL character (ASCII code 0) to a file.Note that