Comparing two numbers with decimal point

kinny · #1 (**permalink**) 2 Weeks Ago

How to compare two numbers with decimal points ?

Is there a way in bash to do this?

frans · #2 (**permalink**) 2 Weeks Ago

I would say bc (type man bc)

Scrutinizer · #3 (**permalink**) 2 Weeks Ago

Or use ksh93 instead of bash

ghostdog74 · #4 (**permalink**) 2 Weeks Ago

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

Scrutinizer · #5 (**permalink**) 2 Weeks Ago

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

ahmad.diab · #6 (**permalink**) 2 Weeks Ago

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

Scrutinizer · #7 (**permalink**) 2 Weeks Ago

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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