Maximum number of characters in a String?

Does anyone know if Strings are limited to a mximum number of characters? If so, what is the limit?
Thanks!
Flo

can you also tell me how Browser handle the memory aspect? AFAIK, they don't.
All I need is a maximum of 1MB for one temporary single String.1MB should be small enough to fit in the memory... where do you get that string?

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