47 lines
3.2 KiB
Markdown
47 lines
3.2 KiB
Markdown
---
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id: cheat-sheet
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title: Cheat Sheet
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---
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<div class="cheatsheet">
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<!--DOCUSAURUS_CODE_TABS-->
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<!--PascaLIGO-->
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|Primitive |Example|
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|--- |---|
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|Strings | `"Tezos"`|
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|Characters | `"t"`|
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|Integers | `42`, `7`|
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|Natural numbers | `42n`, `7n`|
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|Unit| `unit`|
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|Boolean|<pre><code>const hasDriversLicense: bool = False;<br/>const adult: bool = True;</code></pre> |
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|Boolean Logic|<pre><code>(not True) == False == (False and True) == (False or False)</code></pre>|
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|Mutez (micro tez)| `42mutez`, `7mutez` |
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|Address | `"tz1KqTpEZ7Yob7QbPE4Hy4Wo8fHG8LhKxZSx"`, `"KT1JepfBfMSqkQyf9B1ndvURghGsSB8YCLMD"`|
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|Addition |`3 + 4`, `3n + 4n`|
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|Multiplication & Division| `3 * 4`, `3n * 4n`, `10 / 5`, `10n / 5n`|
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|Modulo| `10 mod 3`|
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|Tuples| <pre><code>type name is (string * string);<br/>const winner: name = ("John", "Doe");<br/>const firstName: string = winner.0;<br/>const lastName: string = winner.1;</code></pre>|
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|Types|`type age is int`, `type name is string` |
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|Includes|```#include "library.ligo"```|
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|Functions (short form)|<pre><code>function add (const a : int ; const b : int) : int is<br/> block { skip } with a + b</code></pre>|
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|Functions (long form)|<pre><code>function add (const a : int ; const b : int) : int is<br/> block { <br/> const result: int = a + b;<br/> } with result</code></pre>|
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| If Statement | <pre><code>if age < 16 <br/>then fail("Too young to drive."); <br/>else const new_id: int = prev_id + 1;</code></pre>|
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|Options|<pre><code>type middleName is option(string);<br/>const middleName : middleName = Some("Foo");<br/>const middleName : middleName = None;</code></pre>|
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|Assignment| ```const age: int = 5;```|
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|Assignment on an existing variable <br/></br>*⚠️ This feature is not supported at the top-level scope, you can use it e.g. within functions. Works for Records and Maps as well.*| ```age := 18;```, ```p.age := 21``` |
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|Type Annotations| ```("tz1KqTpEZ7Yob7QbPE4Hy4Wo8fHG8LhKxZSx" : address)```|
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|Variants|<pre><code>type action is<br/>| Increment of int<br/>| Decrement of int</code></pre>|
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|Variant *(pattern)* matching|<pre><code>const a: action = Increment(5);<br/>case a of<br/>| Increment(n) -> n + 1<br/>| Decrement(n) -> n - 1<br/>end</code></pre>|
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|Records|<pre><code>type person is record<br/> age: int ;<br/> name: string ;<br/>end<br/><br/>const john : person = record<br/> age = 18;<br/> name = "John Doe";<br/>end<br/><br/>const name: string = john.name;</code></pre>|
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|Maps|<pre><code>type prices is map(nat, tez);<br/><br/>const prices : prices = map<br/> 10n -> 60mutez;<br/> 50n -> 30mutez;<br/> 100n -> 10mutez;<br/>end<br/><br/>const price: option(tez) = prices[50n];<br/><br/>prices[200n] := 5mutez;</code></pre>|
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|Contracts & Accounts|<pre><code>const destinationAddress : address = "tz1...";<br/>const contract : contract(unit) = get_contract(destinationAddress);</code></pre>|
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|Transactions|<pre><code>const payment : operation = transaction(unit, amount, receiver);</code></pre>|
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|Exception/Failure|`failwith("Your descriptive error message for the user goes here.")`|
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<!--END_DOCUSAURUS_CODE_TABS-->
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</div>
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