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Topic: if statement
Replies: 3   Last Post: Aug 20, 2013 12:48 PM

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Steven Lord

Posts: 18,038
Registered: 12/7/04
Re: if statement
Posted: Aug 20, 2013 12:48 PM
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"Roger Stafford" <> wrote in
message news:kv03b8$mcl$
> "S C.Carl" wrote in message <kuvtvb$gv5$>...
>> a =
>> 0.0188
>> b =
>> 0.0188

> - - - - - - - - -
> The fact that the 'format short' displays of a and b are the same doesn't
> mean that a and b are equal. That display is rounded off to four decimal
> places and they could very easily be unequal. I suggest you try 'format
> hex' on them.

Or just execute:

difference = a-b

For == to say that they are the same, difference must be EXACTLY 0 (ignoring
nonfinite and nondouble edge cases involving saturation.) Close doesn't
count here; == is neither horseshoes nor hand grenades. In this case
difference will likely be a small number, but not exactly 0.

Steve Lord
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