Question

Possible Duplicate:
How can I add numbers in a bash script

I have a variable that changes value in a for loop:

for i in {1..10..1}
  do
    while ((count < max+1))
      do 
        echo $count >> /directory/outfile_${max}.txt
        ((count++))
      done
    max=$max+100
  done

The ten outfiles should have the names “outfile_100.txt”, “outfile_200.txt” etc..

But what happens is that they become like “outfile_100+100+100….txt”

Is it in how I resize max?

Answer 1

You try to compute arithmetic expression and this will not happen with simple assignement. Use max=$(($max + 100))