> For the complete documentation index, see [llms.txt](https://docs.sannybuilder.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sannybuilder.com/troubleshooting/errors/0017.md).

# 0017: Unknown type of variable

The compiler can't recognize the type of a variable. In most cases, it happens as the variable is not declared, or is declared with another type.

**Possible solutions:** [give](/language/data-types/variables.md#declaring-a-variable-type) the variable a type using the `var` keyword


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