> 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/0098.md).

# 0098: Unknown operator

The compiler found an unknown character sequence where a valid [operator](/language/instructions/expressions.md) was expected.

#### Possible solutions:

* Check the syntax and provide a known and valid operator. Valid operators are: `<`, `<=`, `=`, `>`, `>=`, `==`, `<>`, `+=`, `-=,` `*=`, `/=`, `&=`, `|=`, `^=`, `~=`, `%=`, `>>=`, `<<=`, `#=`, `+=@`, `-=@`.