>> << Ndx Usr Pri Phr Dic Rel Voc !: wd Help Primer

# Checkpoint F

At this point you should understand:

- the terms adverb and conjunction
- how to evaluate sentences with adverbs and conjunctions
- how to select subarrays from arrays
- how to modify subarrays in arrays
- boxed data
- hooks and forks
- tacit definition

Check your understanding by doing the following exercises:

- experiment with dyads `{ {. }.` (negative numbers in the left arguments)
- look up a. in the J Dictionary and use it as the right argument in experiments with the dyads `{ {. }.`
- experiment with the adverbs and conjunctions introduced so far
- experiment with the hook `= <.` , determine what it does and why it does it (hint: give it a name and apply it to`2 4 5.2 7 6.5`)
- do the same with the hook `= +`

>> << Ndx Usr Pri Phr Dic Rel Voc !: wd Help Primer