data type in c#

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C#

C#4.0

double has 64 bit size
decimal has 128 bit size
then also why decimal has small range than double.

Posted 17-Oct-12 0:24am

fdiu

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Sushil Mate 17-Oct-12 6:26am

hey you back again with another question :)

fdiu 17-Oct-12 6:39am

today i headache for you.ha ha

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Frederico Barbosa · Accepted Answer · 2012-10-17T00:35:00

Solution 1

Because the decimal have greater precision than the double.

decimal: 28-29 significant digits
double: 15-16 digits.

To get more information, select the keyword 'double' or 'decimal' in visual studio and hit key F1.

Posted 17-Oct-12 0:35am

Frederico Barbosa

OriginalGriff · Accepted Answer · 2012-10-17T00:37:00

Because a decimal has more significant digits than a double, while a double has a larger exponent.

It's like the difference between an integer that can hold 6 digits, and a float that can hold three, with a three digit exponent.
The range of the integer is 0 - 999999, while the float is 0 - 999E999.
While the later can hold larger values, the former is more accurate - the float can't hold 999999, the closest it can come is 999E3, or 999000, or perhaps 1E6 (1000000)

[edit]Added the 1E6 bit - OriginalGriff[/edit]