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| System.Double Structure |
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| Description | |
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The Double structure holds floating point numbers in the range +/-1.79769313486232e308, plus the following extreme values :
| PositiveInfinity | Infinity (N/0) |
| NegativeInfinity | -Infinity (-N/0) |
| NaN | Not a number (0/0) |
Double complies with IEEE standards for calculations.
Unlike the Decimal structure, rounding can occur with Double value calculations.
Double structures are created dynamically from their definition - there is no Create constructor. The native delphi Double type maps to System.Double.
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| Methods | |
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| CompareTo | Compares the current Double value to another |
| Equals | Determines if the current Double equals another |
| IsInfinity | Returns true if a a given Double is +/- infinite in value |
| IsNaN | Returns true if a a given Double has no valid value |
| IsNegativeInfinity | Returns true if a a given Double is - infinite in value |
| IsPositiveInfinity | Returns true if a a given Double is + infinite in value |
| Parse | Converts a string representation of a Double into a Double value |
| ToString | Converts the current Double value to a string |
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| Fields | |
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| Epsilon | | Double | | Smallest non-zero +ve value : 4.94065645841247e-324 | |
MinValue | | Double | | Largest negative value : 1.79769313486232e308 | |
MaxValue | | Double | | Largest negative value : 1.79769313486232e308 | |
NaN | | Double | | Not a number : 0/0 | |
NegativeInfinity | | Double | | -Infinity | |
PositiveInfinity | | Double | | Infinity |
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Microsoft MSDN links
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