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Comparing two numbers with decimal point


 
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# 1  
Old 11-07-2009
Comparing two numbers with decimal point

How to compare two numbers with decimal points ?

Is there a way in bash to do this?
# 2  
Old 11-07-2009
I would say bc (type man bc)
# 3  
Old 11-07-2009
Or use ksh93 instead of bash
# 4  
Old 11-07-2009
Quote:
Originally Posted by kinny
How to compare two numbers with decimal points ?

Is there a way in bash to do this?
you have awk at your disposal.
Code:
$ awk 'BEGIN{if(12.14>12.13){ print "greater"}}'
greater

# 5  
Old 11-07-2009
ksh93:
Code:
if (( 12.14>12.13 )); then echo greater; fi

bash:
Code:
if (( $(bc <<< "12.14>12.13") > 0 )); then echo greater; fi

posix:
Code:
if [ $(echo "12.14>12.13"|bc) -gt 0 ] ; then echo greater; fi

This User Gave Thanks to Scrutinizer For This Post:
# 6  
Old 11-08-2009
Quote:
Originally Posted by Scrutinizer
ksh93:
Code:
if (( 12.14>12.13 )); then echo greater; fi

bash:
Code:
if (( $(bc <<< "12.14>12.13") > 0 )); then echo greater; fi

posix:
Code:
if [ $(echo "12.14>12.13"|bc) -gt 0 ] ; then echo greater; fi

Code:
bash and posix expression didn't work for me!!!!..I have the below OS.

SunOS server2 5.10 Generic_118833-36 sun4u sparc SUNW,Netra-210

# 7  
Old 11-08-2009
Quote:
Originally Posted by ahmad.diab
Code:
bash and posix expression didn't work for me!!!!..I have the below OS.

SunOS server2 5.10 Generic_118833-36 sun4u sparc SUNW,Netra-210

Bash I am not surprised since I gather that is not a happy marriage with Solaris (is it even installed on your system?). However the problem with posix compliant version puzzles me. What is the output of this command on your system:
Code:
echo "12.13>12.14"|bc; echo "12.14>12.13"|bc


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