A (double-precision 64-bit) floating point number has a decimal point and takes up twice as much memory as a single precisionFloating-point number. This data type is often simply called Double.
See Comparing Data Types across Languages for a table that compares the floating point data type across several different languages.
| Language
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Comments
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| VBScript
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The VBScript Double type contains a number as large as ± 3.402823x1038, and as small as ± 1.401298x10-45.
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| JScript
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JScript uses a generic "number" data type which corresponds to integer values as well as floating point values. There is no
specific double-precision floating-point type in JScript.
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| PerlScript
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PerlScript does not have a specific type that represents floating-point values.
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| Python
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Python uses float to represent both single and double floating-point values.
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| C++
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The C++ API uses double (8-byte double floating-point number).
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| C#
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The C# double type (System.Double) uses 15-16 digit precision and is in the approximate range ±5.0 ° 10-324 to ±1.7 ° 10308.
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Tip
See Comparing Data Types across Languages for a table that compares the double-precision floating point data type across several different languages.
For high-level information about how these languages approach data type in general, see one of the following topics:
