double has 64 bit size
decimal has 128 bit size
then also why decimal has small range than double.
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.
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)
Added the 1E6 bit - OriginalGriff[/edit]
Edited 17-Oct-12 0:40am
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