> For the complete documentation index, see [llms.txt](https://gitbook.ziyuesinicization.site/blitz-basic-language-reference/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook.ziyuesinicization.site/blitz-basic-language-reference/keywords.md).

# Keywords

The following keywords are built into Blitz, and may not be used as identifiers (variables, function names, labels, etc.):

{% code overflow="wrap" %}

```basic
After, And, Before, Case, Const, Data, Default, Delete, Dim, Each, Else, ElseIf, End, EndIf, Exit, False, Field, First, Float, For, Forever, Function, Global, Gosub, Goto, If, Insert, Int, Last, Local, Mod, New, Next, Not, Null, Or, Pi, Read, Repeat, Restore, Return, Sar, Select, Shl, Shr, Step, Str, Then, To, True, Type, Until, Wend, While, Xor, Include
```

{% endcode %}