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urbit.org/docs/hoon/reference.md
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1---
2navhome: /docs/
3next: true
4sort: 24
5title: Expression reference
6---
8# Expression reference
10#### A catalog of expressions:
12<div class="book">
14### [Atoms and strings](../atom/)
16### [Limbs and wings](../limb/)
18## `. dot` (nock)
20<list src="../rune/dot" dataPreview="true" className="runes" childIsFragment="true"></list>
22---
24## `! zap` (wild)
26<list src="../rune/zap" dataPreview="true" className="runes" childIsFragment="true"></list>
28---
30## `= tis` (flow)
32<list src="../rune/tis" dataPreview="true" className="runes" childIsFragment="true"></list>
34---
36## `? wut` (test)
38<list src="../rune/wut" dataPreview="true" className="runes" childIsFragment="true"></list>
40---
42## `| bar` (core)
44<list src="../rune/bar" dataPreview="true" className="runes" childIsFragment="true"></list>
46---
48## `~ sig` (hint)
50<list src="../rune/sig" dataPreview="true" className="runes" childIsFragment="true"></list>
52---
54## `: col` (cell)
56<list src="../rune/col" dataPreview="true" className="runes" childIsFragment="true"></list>
58---
60## `% cen` (call)
62<list src="../rune/cen" dataPreview="true" className="runes" childIsFragment="true"></list>
64---
66## `^ ket` (cast)
68<list src="../rune/ket" dataPreview="true" className="runes" childIsFragment="true"></list>
70---
72## `$ buc` (mold)
74<list src="../rune/buc" dataPreview="true" className="runes" childIsFragment="true"></list>
76---
78## `; sem` (make)
80<list src="../rune/sem" dataPreview="true" className="runes" childIsFragment="true"></list>
82</div>