[Fyzbo]

Can anyone explain the difference between float and double? Also is it possible to have your program not run properly by using one instead of the other?

[AlbertB]

A float is defined as being a number of bytes long depending on what implementation you are using. A double is defined as twice that. So the difference is in the range of values they can each hold.

You should find that if there are conflicts between the two in your code you will get warnings flagged, but these are usually to do with possible loss of accuracy.

For most normal purposes float is accurate enough and saves a little memory.

[AlbertB]

This is from M$ Vis Studio 6.0 Help file.

The floating-point types are float and double, representing the single-precision 32-bit and double-precision 64-bit format IEEE 754 values and operations as specified in IEEE Standard for Binary Floating-Point Arithmetic, ANSI/IEEE Standard 754-1985 (IEEE, New York).

There it is, 32 bit precision and 64 bit precision. 64 bit 3D global positioning throughout the Solar System application?