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Top Forums UNIX for Dummies Questions & Answers check if a decimal number is greater than zero Post 302557650 by fpmurphy on Wednesday 21st of September 2011 08:54:45 PM
Old 09-21-2011
Quote:
[ ${a%%.*} -gt 0 ] && echo "ok" || echo "wrong"
This test will fail where a < 1.

Quote:
Unless you're using a really new ksh, numeric comparison doesn't work on numbers with decimal points.
Huh? Floating point support, what you call numbers with decimal points, has been available in ksh93 since 1993.

If you want to do floating point arithmetic from within a bash script, you need to use an external utility such as bc. See Floating Point Math in Bash
 

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hppac(3X)																 hppac(3X)

NAME
hppac: HPPACADDD(), HPPACCMPD(), HPPACCVAD(), HPPACCVBD(), HPPACCVDA(), HPPACCVDB(), HPPACDIVD(), HPPACLONGDIVD(), HPPACMPYD(), HPPAC- NSLD(), HPPACSLD(), HPPACSRD(), HPPACSUBD() - HP 3000-mode packed-decimal library SYNOPSIS
DESCRIPTION
This set of calls invokes the library functions for emulating 3000-mode (MPE V/E) packed-decimal operations. These functions are in library which is searched when the option is used with or ld(1). Performs packed-decimal addition. Compares two packed-decimal numbers. Converts an ASCII representation to packed-decimal. Converts a binary representation to packed-decimal. Converts a packed-decimal number to ASCII. Converts a packed-decimal number to binary. Performs packed-decimal division. Performs packed-decimal division (alternate routine). Performs packed-decimal multiplication. Performs a packed-decimal normalizing left shift. Performs a packed-decimal left shift. Performs a packed-decimal right shift. Performs packed-decimal subtraction. For all operations, the value returned in the variable to which the compcode argument points is one of the following values of type Result > 0 or operand1 > operand2 Result < 0 or operand1 < operand2 Result == 0 or operand1 == operand2 For all operations, the value returned in the variable to which the pacstatus argument points is one of the following values of type Their meanings are intended to be obvious: AUTHOR The HPPAC library was developed by HP. SEE ALSO
PA-RISC Systems Only hppac(3X)
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