arithmetic in ksh

amon · #1 (**permalink**) 01-30-2007

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..

andryk · #2 (**permalink**) 01-30-2007

try this one

Code:

export final=`expr $catch / $num`
echo $final

You might also use bc ...

anbu23 · #3 (**permalink**) 01-30-2007

Code:

$x=4
$y=2
$expr $x / $y
2
$echo $(( x / y ))
2
$echo $x / $y | bc
2

amon · #4 (**permalink**) 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..

anbu23 · #5 (**permalink**) 01-30-2007

Code:

$echo "scale=2; 14 / 100" | bc
.14

amon · #6 (**permalink**) 01-30-2007

well..looks lke that is it..

thanks for quick info..

d.f. · #7 (**permalink**) 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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