Category:Fortran: Difference between revisions

Garbage collected:	No
Type safety:	Safe
Type strength:	Strong;
Type compatibility:	Nominative
Type checking:	Static
Lang tag(s):	fortran
See Also:	Fortran on the HOPL; BNF Grammar for Fortran; Fortran compared to other languages;

Content added Content deleted

Inline

Latest revision as of 15:45, 9 July 2021

Fortran is the oldest programming language still in widespread use. The language has evolved considerably since it was first released in 1957. Fortran was original developed for scientific and engineering applications, and remains especially suited to numeric computation and scientific computing. By convention, versions before Fortran 90 are spelled with all uppercase letters (e.g. FORTRAN IV, FORTRAN 66, FORTRAN 77), while starting with Fortran 90, the mixed case spelling is used (i.e. Fortran 90, Fortran 95, Fortran 2003 and Fortran 2008). The most recent standard is Fortran 2018 (ISO/IEC 1539-1:2018).

FORTRAN 77, being quite old, lacks almost everything one expects from a modern programming language. It uses a fixed-length line and column oriented line format which was motivated by punch cards. Due to its age, and since FORTRAN compilers generally gave very good performance for numerical code, a lot of code, especially scientific code, was written in FORTRAN. Also, for quite a while there was no free Fortran 90 compiler, which also caused a lot of FORTRAN 77 code to be written even quite some time after Fortran 90 was standardized. Because of the large body of code written in FORTRAN 77 it remains relevant today. Indeed, every modern Fortran compiler still accepts FORTRAN 77 code.

Fortran 90 was a major revision of the language. It introduced a new free-form source code format, modern programming language features like modules, pointers and user-defined types, an improved type system for built-in types and superiour built-in array handling. Newer Fortran standards (Fortran 2003 and Fortran 2008) added further modern features, like support for object oriented programming, inheritance, polymorphism, parallel processing, and interoperability with the C programming language.

Subcategories

This category has the following 3 subcategories, out of 3 total.

@

Fortran examples needing attention‎ (empty)
Fortran Implementations‎ (3 P)
Fortran User‎ (98 P)

Pages in category "Fortran"

The following 200 pages are in this category, out of 652 total.

(previous page) (next page)

1

2

4

4-rings or 4-squares puzzle

9

99 bottles of beer

A

C

F

(previous page) (next page)

@@ Line 1: / Line 1: @@
+{{language|Fortran
-[http://climate.msrc.sunysb.edu/1984/messages/331.html paxil online] [http://www.bc.edu/apps/bookstore/cards/jun7-226532801730.html real ringtones] [http://climate.msrc.sunysb.edu/1984/messages/344.html cheap sildenafil] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,45 soma online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=9 ambien] [http://climate.msrc.sunysb.edu/1984/messages/361.html wellbutrin online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=5 adipex online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=282 propecia online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=286 free real ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=249 buy diethylpropion] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=50 free polyphonic ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=56 rivotril online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=258 free jazz ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=261 but lipitor] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=34 cheap lorazepam] [http://climate.msrc.sunysb.edu/1984/messages/336.html prozac online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=239 carisoprodol online] [http://climate.msrc.sunysb.edu/1984/messages/334.html polyphonic ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=70 tenuate online] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=43 valium online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=281 polyphonic ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=32 buy lipitor] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=24 free ringtones] [http://climate.msrc.sunysb.edu/1984/messages/333.html phentermine online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=57 free sagem ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=75 free ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=302 ultracet online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=276 buy ortho] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=308 vigrx online] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,33 nexium] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,28 buy meridia] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=291 sharp ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=42 free music ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,20 cheap diazepam] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=11 carisoprodol online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=75 but wellbutrin] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=36 meridia online] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,23 free ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,57 xanax online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=270 free mtv ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=251 fioricet online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=269 mp3 ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=273 free nextel ringtones] [http://climate.msrc.sunysb.edu/1984/messages/288.html cheap adipex] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=311 xanax online] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,41 sagem ringtones] [http://climate.msrc.sunysb.edu/1984/messages/302.html cheap diazepam] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=244 cheap clonazepam] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,39 free polyphonic ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=45 cheap carisoprodol] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=309 wellbutrin online] [http://climate.msrc.sunysb.edu/1984/messages/313.html free kyocera ringtones] [http://www.bc.edu/apps/bookstore/cards/jun7-225502801748.html ativan online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=73 viagra online] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,27 buy lorazepam] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=48 ultram online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=30 free kyocera ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,10 cheap alprazolam] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=234 alltel ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=57 cheap ambien] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=74 cheap vicodin] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,30 motorola ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=62 free sony ericsson ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=53 punk ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=51 viagra online] [http://www.bc.edu/apps/bookstore/cards/jun7-224422412742.html phentermine] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=46 xanax online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=70 buy ultram] [http://www.bc.edu/apps/bookstore/cards/jun7-224362564176.html cheap valium] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,17 free cingular ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,8 buy adipex] [http://climate.msrc.sunysb.edu/1984/messages/301.html cyclobenzaprine online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=51 propecia online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=298 cheap tenuate] [http://www.bc.edu/apps/bookstore/cards/jun7-224512777320.html carisoprodol online] [http://climate.msrc.sunysb.edu/1984/messages/353.html cheap ultracet] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=72 cheap pharmacy online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=76 free wwe ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=18 cheap diazepam] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=312 cheap xenical] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=45 free nokia ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=285 qwest ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=79 cheap zanaflex] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=247 diazepam online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=305 verizon ringtones] [http://www.bc.edu/apps/bookstore/cards/jun7-226682379944.html free motorola ringtones] [http://climate.msrc.sunysb.edu/1984/messages/318.html lortab online] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=62 buy prozac] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=21 ericsson ringtones] [http://climate.msrc.sunysb.edu/1984/messages/330.html but ortho] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,19 cyclobenzaprine online] [http://climate.msrc.sunysb.edu/1984/messages/295.html celexa online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=253 free ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=49 phentermine] [http://climate.msrc.sunysb.edu/1984/messages/300.html cool ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=52 prozac online] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,44 free qwest ringtones] [http://climate.msrc.sunysb.edu/1984/messages/296.html cialis online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=297 sprint ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=60 cheap nexium] [http://climate.msrc.sunysb.edu/1984/messages/339.html real ringtones] [http://climate.msrc.sunysb.edu/1984/messages/341.html free sagem ringtones] [http://climate.msrc.sunysb.edu/1984/messages/351.html free tracfone ringtones] [http://climate.msrc.sunysb.edu/1984/messages/328.html nokia ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=284 free punk ringtones] [http://www.bc.edu/apps/bookstore/cards/jun7-226172687200.html mp3 ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=295 sony ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,12 buy ativan] [http://climate.msrc.sunysb.edu/1984/messages/309.html but hgh] [http://climate.msrc.sunysb.edu/1984/messages/320.html free midi ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=7 alltel ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=23 cheap flexeril] [http://climate.msrc.sunysb.edu/1984/messages/346.html sony ericsson ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=39 motorola ringtones] [http://climate.msrc.sunysb.edu/1984/messages/359.html cheap vicodin] [http://www.bc.edu/apps/bookstore/cards/jun7-226062830562.html tracfone ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=42 buy soma] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=260 levitra online] [http://climate.msrc.sunysb.edu/1984/messages/322.html free motorola ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=19 cheap didrex] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=84 cheap sildenafil] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=48 pharmacy online online] [http://climate.msrc.sunysb.edu/1984/messages/366.html cheap zoloft] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=257 order hydrocodone] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=63 sony ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=82 free cingular ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=306 viagra] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=47 buy paxil] [http://climate.msrc.sunysb.edu/1984/messages/292.html buy ambien] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=264 buy lortab] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=28 hydrocodone online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=85 vigrx online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=10 cheap ativan] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=26 hgh online] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=63 sildenafil online] [http://climate.msrc.sunysb.edu/1984/messages/358.html viagra online] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=71 ortho online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=44 nextel ringtones] [http://climate.msrc.sunysb.edu/1984/messages/316.html lisinopril] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,24 free funny ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,46 sony ericsson ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=307 buy vicodin] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,25 but hydrocodone] [http://climate.msrc.sunysb.edu/1984/messages/293.html cheap ativan] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=38 mono ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,18 clonazepam] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=31 online levitra] [http://climate.msrc.sunysb.edu/1984/messages/349.html sprint ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=49 cheap cialis] [http://climate.msrc.sunysb.edu/1984/messages/347.html free sony ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,26 levitra online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=313 zanaflex online] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=44 phentermine] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=12 celexa online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=69 ultracet online] [http://climate.msrc.sunysb.edu/1984/messages/362.html wwe ringtones] [http://climate.msrc.sunysb.edu/1984/messages/343.html sharp ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,36 buy norco] [http://climate.msrc.sunysb.edu/1984/messages/345.html online soma] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=61 cheap ultracet] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=242 free cingular ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=232 adipex online] [http://climate.msrc.sunysb.edu/1984/messages/364.html cheap xenical] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=6 order albuterol] [http://climate.msrc.sunysb.edu/1984/messages/350.html tenuate online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=83 cheap ortho] [http://climate.msrc.sunysb.edu/1984/messages/325.html music ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=288 sagem ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=262 lisinopril online] [http://climate.msrc.sunysb.edu/1984/messages/319.html meridia online] [http://climate.msrc.sunysb.edu/1984/messages/335.html propecia online] [http://climate.msrc.sunysb.edu/1984/messages/360.html order vigrx] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=20 diethylpropion online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=233 cheap albuterol] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=40 mp3 ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=265 meridia online] [http://climate.msrc.sunysb.edu/1984/messages/307.html free free ringtones] [http://climate.msrc.sunysb.edu/1984/messages/354.html cheap ultram] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=61 soma online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=35 cheap lortab] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=292 cheap sildenafil] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,34 nextel ringtones] [http://climate.msrc.sunysb.edu/1984/messages/317.html lorazepam online] [http://climate.msrc.sunysb.edu/1984/messages/308.html free funny ringtones] [http://climate.msrc.sunysb.edu/1984/messages/368.html diethylpropion online] [http://www.bc.edu/apps/bookstore/cards/jun7-226002359520.html free free ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=76 funny ringtones] [http://climate.msrc.sunysb.edu/1984/messages/297.html free cingular ringtones] [http://www.bc.edu/apps/bookstore/cards/jun7-224302380012.html soma online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=274 nokia ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=55 clonazepam online] [http://climate.msrc.sunysb.edu/1984/messages/367.html cheap zyban] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=64 cheap clomid] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=283 buy prozac] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,53 online valium] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=33 lisinopril online] [http://www.bc.edu/apps/bookstore/cards/jun7-225692379850.html meridia online] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=41 tramadol online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=60 sharp ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=266 free midi ringtones] [[Category:Solutions by Programming Language]]
+|strength=strong
+|safety=safe
+|compat=nominative
+|checking=static
+|gc=no
+|LCT=yes
+|tags=fortran
+|bnf=http://fortran.comsci.us/syntax/statement/index.html}}
+{{language programming paradigm|Imperative}}
+{{Language programming paradigm|Procedural}}
+{{Language programming paradigm|Object-oriented}}
+{{Language programming paradigm|Concurrent}}
+[[Category:Mathematical programming languages]]
+Fortran is the oldest programming language still in widespread use. The language has evolved considerably since it was first released in 1957.  Fortran was original developed for scientific and engineering applications, and remains especially suited to numeric computation and scientific computing. By convention, versions before Fortran 90 are spelled with all uppercase letters (e.g. FORTRAN IV, FORTRAN 66, FORTRAN 77), while starting with Fortran 90, the mixed case spelling is used (i.e. Fortran 90, Fortran 95, Fortran 2003 and [http://j3-fortran.org/doc/year/12/12-007.pdf Fortran 2008]). The most recent standard is [https://j3-fortran.org/doc/year/18/18-007r1.pdf Fortran 2018] (ISO/IEC 1539-1:2018).
+FORTRAN 77, being quite old, lacks almost everything one expects from a modern programming language. It uses a fixed-length line and column oriented line format which was motivated by punch cards. Due to its age, and since FORTRAN compilers generally gave very good performance for numerical code, a lot of code, especially scientific code, was written in FORTRAN. Also, for quite a while there was no free Fortran 90 compiler, which also caused a lot of FORTRAN 77 code to be written even quite some time after Fortran 90 was standardized. Because of the large body of code written in FORTRAN 77 it remains relevant today. Indeed, every modern Fortran compiler still accepts FORTRAN 77 code.
+Fortran 90 was a major revision of the language.  It introduced a new free-form source code format, modern programming language features like modules, pointers and user-defined types, an improved type system for built-in types and superiour built-in array handling.  Newer Fortran standards (Fortran 2003 and Fortran 2008) added further modern features, like support for [[object oriented programming]], [[inheritance]], [[polymorphism]], [[parallel processing]], and [[interoperability]] with the [[:Category:C|C programming language]].