![]() A DOUBLE PRECISION element has a sign bit, an 11-bit exponent, and a 52-bit fraction. Fortran - Numeric Precision, We have already discussed that, in older versions of Fortran, there were two real types: the default real type and double. The default size for DOUBLE PRECISION with no size specified is 8 bytes. The double-precision data type, DOUBLE PRECISION, which has the synonym, REAL8, holds one double-precision datum. ![]() FORTRAN 66 effectively became the first “industry-standard” version of FORTRAN. A double-precision datum is an approximation of a real number. Traditionally (Win32) Silverfrost Fortran has selected 80-bit precision for all internal floating-point calculations. The FORTRAN defined by the first standard became known as FORTRAN 66 (although many continued to refer to it as FORTRAN IV, the language upon which the standard was largely based). integer list of variables real list of variables double precision list of. Perhaps the most significant development in the early history of FORTRAN was the decision by the American Standards Association (now ANSI) to form a committee to develop an “American Standard Fortran.” The resulting two standards, approved in March 1966, defined two languages, FORTRAN (based on FORTRAN IV, which had served as a de facto standard), and Basic FORTRAN (based on FORTRAN II, but stripped of its machine-dependent features). Variable names in Fortran consist of 1-6 characters chosen from the letters.
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