Prints the given v to the current output, or stdout if not otherwise specified, followed by a newline. (print & v) outputs without a newline, while (print lit v) outputs as a literal form that can be directly read back by (input stx ....) as code. A bare (print) merely prints a newline to the current output.

A shortened macro for print.

Reads a line of input from the current input, or stdin if not otherwise specified, and returns the value read as a string. (input stx ....) instead reads a value using the standard reader, thus providing syntax which can be evaluated with run. If additionally provided with a string, this will be output as a prompt to the current output.

Evaluates the body, with input/ouptut redirected to the given io-port. Only the file port is supported at this time.

Opens the file name as the new target for input or output, depending on the mode provided. mode is a symbol, of one of the following:

A value (distinct from all other values) that represents an end-of-file.

Returns True if v is an eof object.