+## Output Format
+
+On completion, the computed digest (hash value) will be written to the standard output (*stdout*).
+
+The digest will be printed in lower-case hexadecimal notation, by default. Options `-u` and `-c` can influence the format.
+
+If *multiple* files have been given, the hash value of each files is printed in a separate line, followed by the file name.
+
+With the `-r` option specified, hash values will be written to standard output (*stdout*) as "raw" bytes – 48 bytes per hash.
+
+## Exit Code
+
+On success, *zero* is returned. On error or user interruption, a *non-zero* error code is returned.
+