1.79.2 FileStream class: standard streams

stderr

Answer a FileStream that is attached the Smalltalk program’s standard error file handle, which can be used for error messages and diagnostics issued by the program.

stdin

Answer a FileStream that is attached the Smalltalk program’s standard input file handle, which is the normal source of input for the program.

stdout

Answer a FileStream that is attached the Smalltalk program’s standard output file handle; this is used for normal output from the program.