10-14-2012
Quote:
Originally Posted by
elixir_sinari
Only the printf builtin in ksh93t+ seems to give me what I expect (4.5 being rounded to 5 and 5.5 to 6).
Why so?
Because floating point doesn't work that way. It doesn't count in nice 1.0 jumps, and forcing it to do so removes a lot of the point of having a floating point -- both figuratively and literally.
It's not really a missing feature, anyway. Add 0.5 before you print the decimal and that gets you rounding.
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LEARN ABOUT XFREE86
printf
PRINTF(1) User Commands PRINTF(1)
NAME
printf - format and print data
SYNOPSIS
printf FORMAT [ARGUMENT]...
printf OPTION
DESCRIPTION
Print ARGUMENT(s) according to FORMAT, or execute according to OPTION:
--help display this help and exit
--version
output version information and exit
FORMAT controls the output as in C printf. Interpreted sequences are:
" double quote
\ backslash
a alert (BEL)
backspace
c produce no further output
e escape
f form feed
new line
carriage return
horizontal tab
v vertical tab
NNN byte with octal value NNN (1 to 3 digits)
xHH byte with hexadecimal value HH (1 to 2 digits)
uHHHH Unicode (ISO/IEC 10646) character with hex value HHHH (4 digits)
UHHHHHHHH
Unicode character with hex value HHHHHHHH (8 digits)
%% a single %
%b ARGUMENT as a string with '' escapes interpreted, except that octal escapes are of the form or NNN
%q ARGUMENT is printed in a format that can be reused as shell input, escaping non-printable characters with the proposed POSIX $''
syntax.
and all C format specifications ending with one of diouxXfeEgGcs, with ARGUMENTs converted to proper type first. Variable widths are han-
dled.
NOTE: your shell may have its own version of printf, which usually supersedes the version described here. Please refer to your shell's
documentation for details about the options it supports.
AUTHOR
Written by David MacKenzie.
REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report printf translation bugs to <http://translationproject.org/team/>
COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
printf(3)
Full documentation at: <http://www.gnu.org/software/coreutils/printf>
or available locally via: info '(coreutils) printf invocation'
GNU coreutils 8.28 January 2018 PRINTF(1)