# upperCase

Source: https://taxilang.org/docs/language/stdlib/upperCase

**Full name:** `taxi.stdlib.upperCase`

## Signature

```taxi
declare extension function upperCase(String):String
```

## Description

Converts all characters in the string to upper case.

```taxi
find { product: Product } as {
   upperName: String = product.name.upperCase()
}
```

## Examples

Converts a string to upper case.

Query:

```taxi
find {
   upper: String = upperCase('hello world')
}
```

Result:

```json
{
  "upper": "HELLO WORLD"
}
```