HP Prime/Commands/Guides/All About Reals

This is a backup copy of the article from the old "HPWiki" of TI-Planet (that only hosted HP Prime info)

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The real data type has a type ID of 0. It is the standard numeric type of the HP Prime.

Making Constants

Here are some examples of valid real constants:

1
1.
1.0
1e10
1e-10
1E10
1E-10
1e2.3
1ᴇ10
1ᴇ−10

Here are some examples of invalid real constants:

1..
1e+10
1e10.
1e2e3

Limits

The largest real number is MAXREAL, or 9.99999999999ᴇ499. The smallest positive real number is MINREAL, or 1ᴇ−499. Any calculation that attempts to overflow a real value instead becomes MAXREAL. Likewise, Any calculations smaller than MINREAL becomes 0.