dbl

Dbl is a term used as an abbreviation or identifier in several contexts, most often in computing where it denotes the double-precision floating-point data type. The name derives from the word double, describing a numeric type capable of storing a wide range and precision. In programming contexts that employ concise type naming, dbl can serve as a shorthand alias for double in code samples, documentation, or language bindings. A double typically occupies 64 bits and follows the IEEE 754 standard, providing approximately 15 to 17 decimal digits of precision and a range roughly from 4.9 × 10^−324 to 1.8 × 10^308 for positive values. Operations include conventional arithmetic, comparisons, and conversions to other numeric representations.

Beyond data types, Dbl or DBL is used as an acronym in various projects, products, and identifiers, and may appear as a file extension or a brand name. Because there is no single universal meaning, the intended interpretation of Dbl depends on context, such as the field, language, or application in which it appears. In documentation, it is common to specify whether Dbl refers to a double-precision value or to a specific entity whose initials form DBL.

See also: double, floating-point number, IEEE 754, type alias.