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Full Discussion: Convert string to numeric
Top Forums Shell Programming and Scripting Convert string to numeric Post 43266 by Ygor on Friday 14th of November 2003 04:54:31 AM
Old 11-14-2003
I'm afraid that you can only do integer arithmetic and comparisons via the shell. One way to get around this is to use a utility like awk or bc to multiply your variables by the same amount, eg....

a=0.89
x=0.5
a=$(echo $a|awk '{print $1*1000}')
x=$(echo $x|awk '{print $1*1000}')

if [ $a -gt $x ]
then
echo $a Greater than $x
fi

Gives...

890 Greater than 500
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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