ID: Q129171
3.00 WINDOWS kbprg
The information in this article applies to:
With the addition of Double, Integer, and Currency data types, Visual FoxPro version 3.0 now has five numeric data type possibilities. This article describes the difference among the five numeric data types, explaining the circumstances under which each should be used.
The Currency data type is new to Visual FoxPro version 3.0. Use it to store monetary amounts. Currency requires eight bytes in memory and eight bytes on disk.
With the Currency data type, data is limited to four decimal positions of precision. The numeric precision of Currency fields is:
-92233720368477.5807 to 922337203685477.5807
The Double data type is new to Visual FoxPro version 3.0. The double is a floating point numeric stored to disk as an eight-byte binary value. Use the double data type when the numeric precision of numeric, float, or integer fields is insufficient. The numeric precision of double fields is:
-4.94065648541247E-324 to 1.79769313486232E+308
The Integer data type is new to Visual FoxPro. Use the integer data type to store integers (numeric values without decimal positions). Integers require four bytes on disk and in memory. The numeric precision of integer fields is:
-2147483647 to 2147483646
The numeric and float data types each existed in FoxPro versions 2.5 and 2.6. In Visual FoxPro, the two data types are identical (float is provided for compatibility reasons only). Use them to store integers or numbers with decimal positions. Numeric and float data types are stored in memory as eight bytes and are stored on disk from between one and 20 bytes. They are stored in a table on disk. The numeric precision of numeric and float fields is:
.9999999999E+20 to - .9999999999E+19
Keywords : FxotherGeneral
Version : 3.00
Platform : WINDOWSLast Reviewed: May 1, 1996