Integer comparison in bash Integer comparison in bash shell shell

Integer comparison in bash


bash shell unix

The command [ can't handle arithmetics inside its test. Change it to:

if [ $i -ne $((hosts_count-1)) ]; then

Edit: what @cebewee wrote is also true; you must put a space in front of the closing ]. But, just doing that will result in yet another error: extra argument '-'

bash shell unix

  1. The ] must be a separate argument to [.

  2. You're assuming you can do math in [.

    if [ $i -ne $(($hosts_count - 1)) ] ; then

bash shell unix

In bash, you can avoid both [ ] and [[ ]] by using (( )) for purely arithmetic conditions:

if (( i != hosts_count - 1 )); then  cmd="$cmd"fi

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