What is wrong with this simple expression?

[Lucinda_Mason]

“Start Date must be " TODAY() " or later.”

Trying to implement the suggestion in https://blog.appsheet.com/feature-friday-sliding-actions-invalid-input-error-messages-workday-expres...

Thanks.

[Aleksi · Accepted solution]

Please write it like “Start date must be “&TODAY()&” or later.”

[JuneCorpuz]

Don’t forget to use ampersand when you are writing text and formula

[Lucinda_Mason]

Aleksi:

&TODAY()&

Thank you.

I’ve read many of the Help articles on expressions. Where can I find more rules like this? I couldn’t find the need for ampersand any where. Thanks. I have lots to learn.

[Austin]

& is used instead of a concatenate(). It’s the short hand for that formula.
I don’t actually know that there is any documentation on this being the case.

[Lucinda_Mason]

Thanks Austin. That helps me understand it better.