Editing PL/I (section)

{{Short description|Procedural, imperative computer programming language}}
{{Redirect|New programming language|the process of implementing new programming languages|Programming language design#Design and implementation}}
{{Infobox programming language
| name = PL/I
| logo = 
| paradigm = [[Procedural programming|Procedural]], [[Imperative programming|imperative]], [[Structured programming|structured]]
| released = {{Start date and age|1964|df=yes}}
| designers = [[IBM]],<br/>[[SHARE (computing)|SHARE]] Language Development Committee,<br/>[[International Organization for Standardization|ISO]]
| typing = 
| implementations = 
| dialects = See [[#PL/I dialects|dialects]]
| influenced by = [[COBOL]], [[Fortran]], [[ALGOL 60]]
| influenced = [[Control Language]], [[PL/M]], [[IBM PL/S|PL/S]], [[PL-6]], [[PL.8]], [[Rexx]], [[SAS language|SAS]]
| wikibooks = PL/I
}}

'''PL/I''' ('''Programming Language One''', pronounced {{IPAc-en|p|iː|_|ɛ|l|_|w|ʌ|n}} and sometimes written '''PL/1''')<ref>{{cite news |work=[[The New York Times]]
 |url=https://www.nytimes.com/1984/06/20/business/changes-at-ibm.html
 |title=Changes at I.B.M. |date=June 20, 1984}}</ref> is a [[Procedural programming|procedural]], [[imperative programming|imperative]] computer [[programming language]] initially developed by [[IBM]]. It is designed for scientific, engineering, business and system programming. It has been in continuous use by  academic, commercial and industrial organizations since it was introduced in the 1960s.<ref>{{cite book |last1=Sturm |first1=Eberhard |year=2009 |title=The New PL/I |publisher=Vieweg+Teubner |isbn=978-3-8348-0726-7}}</ref>

A PL/I [[American National Standards Institute]] (ANSI) [[technical standard]], X3.53-1976, was published in 1976.

PL/I's main domains are [[data processing]], [[numerical computation]], [[scientific computing]], and [[system programming]]. It supports [[recursion]], [[structured programming]], [[linked data structure]] handling, [[Fixed-point arithmetic|fixed-point]], [[floating-point]], [[Complex arithmetic|complex]], [[String (computer science)|character string]] handling, and [[bit string]] handling. The language syntax is English-like and suited for describing complex data formats with a wide set of functions available to verify and manipulate them.