significant digits?

[Jonathan Buzzard]

bminton at efn.org said:
> This is only for equality.  In this specific instance, 0.95 as a float is
>
> 0.949999988079071044921875000000000000 in hex is "3F733333"
> 0.950000047683715820312500000000000000 in hex is "3F733334"
> so any number in the range
> [0.949999988079071044921875000000000000,0.950000047  683715820312500000000000000) is counted as equal to 0.95 

It is *not* just for equality. The point is you could have something
that equates to less than 0.95 so a suitable printf of a value that
equated to something in the range of numbers near 0.95 that are
all treated the same will look less than 0.95, yet fail the
inequality test.

[SNIP]

> which, when run produces:
> FALSE
> FALSE
> TRUE
> TRUE 

Which proves my point, though it is not really important in this instance
however.

JAB.

-- 
Jonathan A. Buzzard                 Email: jonathan at buzzard.me.uk
Northumberland, United Kingdom.       Tel: +44 1661-832195