142 lines
2.3 KiB
Markdown
142 lines
2.3 KiB
Markdown
---
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id: strings
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title: Strings
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---
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import Syntax from '@theme/Syntax';
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Strings are defined using the built-in `string` type like this:
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<Syntax syntax="pascaligo">
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```
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const a : string = "Hello Alice"
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```
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</Syntax>
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<Syntax syntax="cameligo">
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```
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let a : string = "Hello Alice"
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```
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</Syntax>
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<Syntax syntax="reasonligo">
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```reasonligo
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let a : string = "Hello Alice";
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```
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</Syntax>
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## Concatenating Strings
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<Syntax syntax="pascaligo">
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Strings can be concatenated using the `^` operator.
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```pascaligo group=a
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const name : string = "Alice"
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const greeting : string = "Hello"
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const full_greeting : string = greeting ^ " " ^ name
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```
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</Syntax>
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<Syntax syntax="cameligo">
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Strings can be concatenated using the `^` operator.
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```cameligo group=a
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let name : string = "Alice"
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let greeting : string = "Hello"
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let full_greeting : string = greeting ^ " " ^ name
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```
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</Syntax>
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<Syntax syntax="reasonligo">
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Strings can be concatenated using the `++` operator.
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```reasonligo group=a
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let name : string = "Alice";
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let greeting : string = "Hello";
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let full_greeting : string = greeting ++ " " ++ name;
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```
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</Syntax>
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## Slicing Strings
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Strings can be sliced using a built-in function:
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<Syntax syntax="pascaligo">
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```pascaligo group=b
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const name : string = "Alice"
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const slice : string = String.slice (0n, 1n, name)
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```
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> Note that `string_slide` is *deprecated*.
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</Syntax>
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<Syntax syntax="cameligo">
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```cameligo group=b
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let name : string = "Alice"
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let slice : string = String.slice 0n 1n name
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```
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</Syntax>
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<Syntax syntax="reasonligo">
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```reasonligo group=b
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let name : string = "Alice";
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let slice : string = String.slice (0n, 1n, name);
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```
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</Syntax>
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> ⚠️ Notice that the offset and length of the slice are natural
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> numbers.
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## Length of Strings
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The length of a string can be found using a built-in function:
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<Syntax syntax="pascaligo">
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```pascaligo group=c
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const name : string = "Alice"
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const length : nat = String.length (name) // length = 5
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```
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> Note that `size` is *deprecated*.
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</Syntax>
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<Syntax syntax="cameligo">
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```cameligo group=c
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let name : string = "Alice"
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let length : nat = String.size name // length = 5
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```
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</Syntax>
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<Syntax syntax="reasonligo">
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```reasonligo group=c
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let name : string = "Alice";
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let length : nat = String.size (name); // length == 5
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```
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</Syntax>
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