How to create incrementing counter


 
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# 1  
Old 08-13-2008
How to create incrementing counter

i am using SCO OpenServer 5

I wan to use bash and have a incrementing counter.
e.g.
Code:
#!/bin/bash

counter=1

let "counter+=1"

echo $counter

It says that it does not recognise let
So how should i do it?
# 2  
Old 08-13-2008
can you try out this...

#!/bin/bash
counter=1
counter=`expr $counter + 1`
echo $counter
# 3  
Old 08-13-2008
Quote:
Originally Posted by palsevlohit_123
#!/bin/bash
counter=1
counter=`expr $counter + 1`
echo $counter
nope, does not work
result
Code:
1+1

# 4  
Old 08-13-2008
find the outputs from myside

> cat counter.bash
#!/bin/bash
counter=1
counter=`expr $counter + 1`
echo $counter

> bash counter.bash
2
# 5  
Old 08-13-2008
Works for me, did you copy + paste it correctly?

Actually your original script works here, too; maybe you have a really old bash. The expr script should work regardless, though.
# 6  
Old 08-13-2008
let is a built-in command, when we run it in script, it does not working. we can say subshell.

Quote:
sh let.sh
let.sh: 2: let: not found
1
What can we do to run it in subshell.

- nilesh
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