Largest Number for a variable

[Taifun]

@Mumuji

10 characters

See also

Check if number is an integer

Another negative to that approach is that once your values are large/small enough, App Inventor will switch to using scientific notation, so even though there's a period present in the printed representation that doesn't imply that "integer-ness" of the value. For example, 1.234567E10 is an integer but 1.234567E5 is not.

Taifun