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doc: string immutability example

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Swastik Baranwal 2020-09-14 19:48:10 +05:30 committed by GitHub
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@ -355,7 +355,14 @@ println(s) // "hello world"
In V, a string is a read-only array of bytes. String data is encoded using UTF-8. In V, a string is a read-only array of bytes. String data is encoded using UTF-8.
Strings are immutable. Just like in Go and Java, strings are immutable, which means their values cannot be changed.
The following code will raise an error:
```v
mut s := 'hello'
s[0] = `H`
```
Both single and double quotes can be used to denote strings. For consistency, Both single and double quotes can be used to denote strings. For consistency,
`vfmt` converts double quotes to single quotes unless the string contains a single quote character. `vfmt` converts double quotes to single quotes unless the string contains a single quote character.