Parse string in bash script

[maxsthekat]

Hi,

I have to create a bash script that takes an arbitrary length number from the command line, and add up each individual digit

Ex:
server> myscript.sh 123
server> 1 + 2 + 3 = 6

The problem I'm having is pulling out each character.

Is there a way in bash I can parse the input string for each character? I can't figure out a way to do this.

Thanks!

-Max

[Kieren]

You can use a for loop to get each number:

for ((i=0; ${1:$i:1}; i++))
do
        echo ${1:$i:1}
done

[maxsthekat]

Thanks for replying!

I tried running that, but all I get is "command not found." Do you know what might be causing it?

[maxsthekat]

Oops! Nevermind, I'm an idiot :P I had #!/bash/sh as the first line, instead of #!/bin/sh

Thanks again for your help!

[Kieren]

Sorry I'm not sure what it is you have done. If you enter that code into a text file and save it it should run. If you save it as myscript.sh you run it as:

./myscript.sh 123454321