| --- | |
| sidebar_label: upper | |
| description: >- | |
| The upper function converts all cased letters in the given string to | |
| uppercase. | |
| --- | |
| # `upper` Function | |
| `upper` converts all cased letters in the given string to uppercase. | |
| ## Examples | |
| ``` | |
| > upper("hello") | |
| HELLO | |
| > upper("алло!") | |
| АЛЛО! | |
| ``` | |
| This function uses Unicode's definition of letters and of upper- and lowercase. | |
| ## Related Functions | |
| * [`lower`](../../language/functions/lower.mdx) converts letters in a string to _lowercase_. | |
| * [`title`](../../language/functions/title.mdx) converts the first letter of each word in a string to uppercase. |