# _CP_alpha

The _CP_alpha function is equivalent
to the `*result* = alpha(*string*)` BASIC statement.

## Syntax

```
int _CP_alpha(int* result, CPSTR* string)
```

## Description

This function returns -1 if
an error occurs. The error code is contained in _CP_errno.

## Example(s)

```
/* is "hi" alphabetic? */
CPSTR * s = _CP_mkstr("hi");
int i;

_CP_alpha(&i,s);
_CP_unix_env();
printf("%d\n", i);
_CP_str_free(s);
```

## See also

- [C functions overview](https://d3codex.com/cfunctions/c-functions-overview/)

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Source: https://d3codex.com/cfunctions/cp-alpha/ - part of the D3Codex reference.