Red pound sign in a variable. Not sure what it means

I was writing code in Matlab and rather than typing a 3 I accidently held shift and typed # in the variable name. It showed up as red text and it got me curious as to what this symbol does to a variable. ex variable name R#, where the pound sign was red

[Stephen23]

It does nothing. The hash symbol # is not a permitted character in variable names.

[spencer ludington]

I figured it was something like that. I had just never seen it before and I was curious. Thanks

Answer 1

[Star Strider]

The red symbol means that it’s an illegal character. The pound sign is not recognised as an operator.