NUMBER(6) BSD Reference Manual NUMBER(6)
number - convert Arabic numerals to English
number [-l] [# ...]
The number utility prints the English equivalent of the number to the
standard output, with each 10^3 magnitude displayed on a separate line.
If no argument is specified, number reads lines from the standard input.
The options are as follows:
-l Display the number on a single line.
Although number understand fractions, it doesn't understand exponents.
4.4BSD March 31, 1994 1