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UNIX for Dummies Questions & Answers
Dividing float values
Post 302103215 by shash on Wednesday 17th of January 2007 04:37:44 AM
01-17-2007
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I am trying to compare 2 float values using if
the foll code does not work
a=1.4
b=1.6
if test $a -gt $b
then
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else
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fi
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Hi,
I do have a very simple task to divide 2 variables and display the result.
I CANNOT use bc
when i try
var1=2
var2=4
var3=$(($var1 / $var2))
echo $var3
the output is always 0
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Hi,
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Does anyone know how to include as a script maybe an "echo" warning that explains that if a user uses the second number "zero" when dividing, that the result will BE "zero."
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png - Portable Network Graphics (PNG) format DESCRIPTION
PNG (Portable Network Graphics) is an extensible file format for the lossless, portable, well-compressed storage of raster images. PNG pro- vides a patent-free replacement for GIF and can also replace many common uses of TIFF. Indexed-color, grayscale, and truecolor images are supported, plus an optional alpha channel. Sample depths range from 1 to 16 bits. PNG is designed to work well in online viewing applications, such as the World Wide Web, so it is fully streamable with a progressive dis- play option. PNG is robust, providing both full file integrity checking and fast, simple detection of common transmission errors. Also, PNG can store gamma and chromaticity data for improved color matching on heterogeneous platforms. SEE ALSO
libpng(3),zlib(3),deflate(5),andzlib(5) PNG specification (second edition), November 2003: <http://www.w3.org/TR/2003/REC-PNG-20031110/ PNG 1.2 specification, July 1999: http://www.libpng.org/pub/png PNG 1.0 specification, October 1996: RFC 2083 ftp://ds.internic.net/rfc/rfc2083.txt or (as a W3C Recommendation) at http://www.w3.org/TR/REC-png.html AUTHORS
This man page: Glenn Randers-Pehrson Portable Network Graphics (PNG) Specification (Second Edition) Information technology - Computer graphics and image processing - Portable Network Graphics (PNG): Functional specification. ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others. Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999): Glenn Randers-Pehrson and others (png-list). Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996): Thomas Boutell and others (png-list). COPYRIGHT NOTICE
This man page is Copyright (c) 1998-2006 Glenn Randers-Pehrson. See png.h for conditions of use and distribution. The PNG Specification (Second Edition) is Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved. The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson. See the specification for conditions of use and distribution. The PNG-1.0 specification is copyright (c) 1996 Massachusetts Institute of Technology. See the specification for conditions of use and distribution. June 26, 2010 PNG(5)