a simple while loop

syno · #1 (**permalink**) 04-07-2006

Hallo everyone

I might just be being dumb, but I am using the BASH shell and cannot get the following script to work:

x=0
while [ $x -lt 10 ]
do
echo $x
x=´echo "$x + 1" | bc´
done

Can anybody help me out. I am just get a repeating output saying:
bc: command not found
0 + 1: command not found

Any suggestions would be helpful

jim mcnamara · #2 (**permalink**) 04-07-2006

Code:

x=`echo "$x + 1" | bc`

... backticks ....

mph · #3 (**permalink**) 04-07-2006

You could also use

Code:

x=$((x+1))

sssow · #4 (**permalink**) 04-07-2006

Also can use let

x=0
while [ $x -lt 10 ]
do
echo $x
let x=x+1
done

Ygor · #5 (**permalink**) 04-07-2006

bash also has the for loop constuct

Code:

for (( x=0 ; x<10 ; x++ )) 
do 
    echo $x
done

syno · #6 (**permalink**) 04-08-2006

Thanks guys!

You have been a real help

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