# Special variables

Brief description for some of the special variables are given below:

* `$0` contains the input record content
* `$1` first field
* `$2` second field and so on
* `FS` input field separator
* `OFS` output field separator
* `NF` number of fields
* `RS` input record separator
* `ORS` output record separator
* `NR` number of records (i.e. line number) for entire input
* `FNR` number of records per file