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Re: Floating Array Shows no numbers after the dot [message #29456 is a reply to message #29455]

Wed, 20 February 2002 06:26

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

"Martin Downing" <martin.downing@ntlworld.com> writes:
> [hmm - as an aside, does anyone know why DOUBLE can only store 2 more digits
> cf. FLOAT considering it uses 4 extra bytes which is enough for a 10 digit
> LONG ?]

Hi Martin--

Where are you getting your info? I get the following:
float - mantissa 24 bis = 7.2 decimal digits
double - mantissa 53 bits = 16.0 decimal digits
DOUBLE can store more than twice as many digits as FLOAT. The
increase in digits in the exponent is fewer. I got these values from
MACHAR().

Craig

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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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[Message index]

		Re: Floating Array Shows no numbers after the dot By: Martin Downing on Wed, 20 February 2002 07:09
		Re: Floating Array Shows no numbers after the dot By: tam on Wed, 20 February 2002 06:19
		Re: Floating Array Shows no numbers after the dot By: Craig Markwardt on Wed, 20 February 2002 06:26
		Re: Floating Array Shows no numbers after the dot By: Martin Downing on Wed, 20 February 2002 01:32
		Re: Floating Array Shows no numbers after the dot By: David Fanning on Tue, 19 February 2002 09:26
		Re: Floating Array Shows no numbers after the dot By: R.Bauer on Tue, 19 February 2002 09:07

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