Wrap input lines in each FILE (standard input by default), writing to standard output.

Mandatory arguments to long options are mandatory for short options too.

-b, --bytes

count bytes rather than columns

-c, --characters

count characters rather than columns

-s, --spaces

break at spaces

-w, --width=WIDTH

use WIDTH columns instead of 80

--help

display this help and exit

--version

output version information and exit

info fold

should give you access to the complete manual.