# upper {#upper}

**Parent topic:**[Functions](../../Functions/category.md)

## Syntax {#syntax}

`upper(X)`

## Arguments {#arguments}

**X** is a string scalar/vector.

## Details {#details}

Convert all characters in a string or a list of strings into upper cases.

## Examples {#examples}

```
x = `Ibm`C`AapL;
x.upper();
// output: ["IBM","C","AAPL"]

(`Thl).upper();
// output: THL
```

Related function: [lower](../l/lower.md)

