#Blank line simply fortran manual#
The first manual for FORTRAN describes it as a Formula Translating System and printed the name with small caps, F ORTRAN.
3.9.1 Conditional compilation and varying length strings.3.7 Transition to ANSI Standard Fortran.Since August 2021 Fortran has ranked among the top 15 languages in the TIOBE index, a measure of the popularity of programming languages.
Among the better-known is BASIC, which is based on FORTRAN II with a number of syntax cleanups, notably better logical structures, and other changes to work more easily in an interactive environment. Successive versions have added support for structured programming and processing of character-based data (FORTRAN 77), array programming, modular programming and generic programming (Fortran 90), High Performance Fortran (Fortran 95), object-oriented programming (Fortran 2003), concurrent programming (Fortran 2008), and native parallel computing capabilities (Coarray Fortran 2008/2018).įortran's design was the basis for many other programming languages. The IBM Blue Gene/P supercomputer installation in 2007 at the Argonne Leadership Angela Yang Computing Facility located in the Argonne National Laboratory, in Lemont, Illinois, USA.įortran has had numerous versions, each of which has added extensions while largely retaining compatibility with preceding versions. It is a popular language for high-performance computing and is used for programs that benchmark and rank the world's fastest supercomputers. It has been in use for over six decades in computationally intensive areas such as numerical weather prediction, finite element analysis, computational fluid dynamics, geophysics, computational physics, crystallography and computational chemistry. RE: Including blank lines when reading a file.Absoft, Cray, GFortran, G95, IBM XL Fortran, Intel, Hitachi, Lahey/Fujitsu, Numerical Algorithms Group, Open Watcom, PathScale, PGI, Silverfrost, Oracle Solaris Studio, othersĪLGOL 58, BASIC, C, Chapel, CMS-2, DOPE, Fortress, PL/I, PACT I, MUMPS, IDL, Ratforįortran ( / ˈ f ɔːr t r æ n/ formerly FORTRAN) is a general-purpose, compiled imperative programming language that is especially suited to numeric computation and scientific computing.įortran was originally developed by IBM in the 1950s for scientific and engineering applications, and subsequently came to dominate scientific computing. You can skip '1x' when you write to a file. This may still extist in some compilers, so always use '1x' when you write on screen or directly on a printer. In the old days the first character (or letter) written on the screen or on printers was a kind of control character: "0" or "+" meant extra line if I remember correctly and "1" meant a page brake. I = len_trim(a) ! i is then the length of a
If you want to WRITE this character string on the SCREEN, you better use the edit descriptor '1x' also, which outputs one blank character first: If you are reading a character variable, you write: If you want to WRITE these variable on the SCREEN with three decimals, you write: If you want to WRITE these variable to a FILE with THREE decimals, you write: If you are reading real variables, you write: Yes, the "a" is an edit descriptor for character strings.
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