---
tags:
  - jq
  - json
---
`jq` is a filter program. Everything , including literals, are `filters` in jq.
filter have input and output.
ops that combine filters like addition or division feed same input to both filters before doing the operation e.g `[1 2 3] | add / length` < array is passd to both add and length and then de division is done.

identity filter use quotes or brackets and quotes if name has special values such as whitespace. `."Fo o"` || `.["Fo o"]`