While the other reply to you is correct, the actual answer to your question is No -- bash interprets leading 0s (zeros) in the C sense, it indicates octal not decimal. So this very small bash will fail for you:

    X="08"
    if [[ "$X" -eq 8 ]]; then
      echo Y
    fi

Use `bash -x` to run it in debug mode:

    $ bash -x test.sh 
    + X=08
    + [[ 08 -eq 8 ]]
    test.sh: line 2: [[: 08: value too great for base (error token is "08")

This comes into play if you're dealing with things like IPv4 address, where it is technically allowable to have leading zeros, however by convention it's never done because of code traps which see those leading zeros as octal mode, not decimal.