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arithmetic in ksh

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# 1  
Old 01-30-2007
arithmetic in ksh
Helloo..

I am trying one very simple thing I could not find anything on google..


I have 2 integer variable..and I need to do division...in ksh
where $catch and $num are integer variable..

I tryed with this:

printf "%0.2f" $final=$catch/$num

but it does not work..

any help is welcome..
# 2  
Old 01-30-2007
try this one
Code:
export final=`expr $catch / $num`
echo $final

You might also use bc ...
# 3  
Old 01-30-2007
Code:
$x=4
$y=2
$expr $x / $y
2
$echo $(( x / y ))
2
$echo $x / $y | bc
2

Last edited by anbu23; 01-30-2007 at 08:06 AM..
# 4  
Old 01-30-2007
Rightttt but this is not wanted result..

I tryed also bc I forgot to mention that..

but my $catch is 14 $num is 100

it is defined above in program..


result should be 0,14 also I tryed this:

x=`echo $catch / $num | bc`
echo $x

but this does not give goot results..
# 5  
Old 01-30-2007
Code:
$echo "scale=2; 14 / 100" | bc
.14

# 6  
Old 01-30-2007
well..looks lke that is it..

thanks for quick info..
# 7  
Old 01-30-2007
Quote:
Originally Posted by anbu23
Code:
$x=4
[...snip...]

$echo $(( x / y ))
2

[...snip...]

Isn't this the "preferred" way of doing arithmetic in ksh and bash? I recall reading that it doesn't spawn a new shell like expr and bc.
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