Double precision

karthikkumar · March 23, 2017, 01:15

What is double precision?

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bpulat · March 23, 2017, 08:40

Double Precision refers to a type of floating-point number that has more precision (that is, more digits to the right of the decimal point) than a single-precision number.

piu58 · March 23, 2017, 12:03

Double has 48 bit mantissa at pc based systems (because the mathematical co processor uses that format). It covers ~ 14 decimals.

karthikkumar · April 6, 2017, 23:41

Bro..still I am confused .

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LuckyTran · April 7, 2017, 16:47

Dude just google it or search on Wikipedia.

https://en.wikipedia.org/wiki/Double...g-point_format

Double precision in common usage refers to the usage of 64 binary bits to represent numbers in memory. More bits, means less digits get truncated and you get more accuracy.

Single precision uses 32 bits.

karthikkumar · April 7, 2017, 21:17

Thank-you so much dude.

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March 23, 2017, 01:15	Double precision	#1
karthikkumar New Member karthi Join Date: Mar 2017 Posts: 7 Rep Power: 9	What is double precision? Sent from my T02 using CFD Online Forum mobile app

March 23, 2017, 08:40		#2
bpulat Member Baris PULAT Join Date: Sep 2016 Location: Italy Posts: 59 Rep Power: 10	Double Precision refers to a type of floating-point number that has more precision (that is, more digits to the right of the decimal point) than a single-precision number. karthikkumar likes this.

March 23, 2017, 12:03		#3
piu58 Senior Member Uwe Pilz Join Date: Feb 2017 Location: Leipzig, Germany Posts: 744 Rep Power: 15	Double has 48 bit mantissa at pc based systems (because the mathematical co processor uses that format). It covers ~ 14 decimals. karthikkumar likes this. __________________ Uwe Pilz -- Die der Hauptbewegung überlagerte Schwankungsbewegung ist in ihren Einzelheiten so hoffnungslos kompliziert, daß ihre theoretische Berechnung aussichtslos erscheint. (Hermann Schlichting, 1950)

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April 6, 2017, 23:41		#4
karthikkumar New Member karthi Join Date: Mar 2017 Posts: 7 Rep Power: 9	Bro..still I am confused . Sent from my T02 using CFD Online Forum mobile app

April 7, 2017, 16:47		#5
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,737 Rep Power: 66	Dude just google it or search on Wikipedia. https://en.wikipedia.org/wiki/Double...g-point_format Double precision in common usage refers to the usage of 64 binary bits to represent numbers in memory. More bits, means less digits get truncated and you get more accuracy. Single precision uses 32 bits.

April 7, 2017, 21:17		#6
karthikkumar New Member karthi Join Date: Mar 2017 Posts: 7 Rep Power: 9	Thank-you so much dude. Sent from my T02 using CFD Online Forum mobile app