Perl | Use of STDIN for Input - GeeksforGeeks

Input to a Perl program can be given by keyboard with the use of . Here, STDIN stands for Standard Input . Though there is no need to ... 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ChangeLanguage DataStructuresAlgorithmsInterviewPreparationTopic-wisePracticeC++JavaPythonCompetitiveProgrammingMachineLearningWrite&EarnJavaScriptSDESheetPuzzlesGFGSchoolProjects RelatedArticles ▲RelatedArticlesWriteanArticleWriteArticlesPickTopicstowriteGuidelinestoWriteGetTechnicalWritingInternshipWriteanInterviewExperienceUseofprint()andsay()inPerlPerl|printoperatorPerl|UseofSTDINforInputPerl|STDINinScalarandListContextPerl|SortingofArraysPerl|ComparingScalarsPerl|scalarkeywordPerl|ScalarsPerl|ArraysPerl|Arrays(push,pop,shift,unshift)Perl|push()FunctionPerl|join()FunctionPerl|Loops(for,foreach,while,do…while,until,Nestedloops)Perl|DecisionMaking(if,if-else,Nested–if,if-elsifladder,unless,unless-else,unless-elsif)Perl|split()FunctionPerl|chomp()FunctionPerl|chop()FunctionPerl|Removingleadingandtrailingwhitespaces(trim)Perl|StringOperatorsPerl|Stringfunctions(length,lc,uc,index,rindex)Perl|UsefulStringfunctionsPerl|UsefulArrayfunctionsPerl|exists()FunctionPerl|grep()FunctionPerl|SearchinginaFileusingregexPerl|substr()functionWriteanArticleWriteArticlesPickTopicstowriteGuidelinestoWriteGetTechnicalWritingInternshipWriteanInterviewExperienceUseofprint()andsay()inPerlPerl|printoperatorPerl|UseofSTDINforInputPerl|STDINinScalarandListContextPerl|SortingofArraysPerl|ComparingScalarsPerl|scalarkeywordPerl|ScalarsPerl|ArraysPerl|Arrays(push,pop,shift,unshift)Perl|push()FunctionPerl|join()FunctionPerl|Loops(for,foreach,while,do…while,until,Nestedloops)Perl|DecisionMaking(if,if-else,Nested–if,if-elsifladder,unless,unless-else,unless-elsif)Perl|split()FunctionPerl|chomp()FunctionPerl|chop()FunctionPerl|Removingleadingandtrailingwhitespaces(trim)Perl|StringOperatorsPerl|Stringfunctions(length,lc,uc,index,rindex)Perl|UsefulStringfunctionsPerl|UsefulArrayfunctionsPerl|exists()FunctionPerl|grep()FunctionPerl|SearchinginaFileusingregexPerl|substr()functionPerl|UseofSTDINforInputViewDiscussion ImproveArticle SaveArticle LikeArticle DifficultyLevel: MediumLastUpdated: 24Jun,2019ReadDiscussViewDiscussion ImproveArticle SaveArticle LikeArticle Perlallowstheprogrammertoacceptinputfromtheusertoperformoperationson.ThismakesiteasierfortheusertogiveinputofitsownandnotonlytheoneprovidedasHardcodedinputbytheprogrammer.ThisInputcanthenbeprocessedandprintedwiththeuseofprint()function.InputtoaPerlprogramcanbegivenbykeyboardwiththeuseof.Here,STDINstandsforStandardInput.ThoughthereisnoneedtoputSTDINinbetweenthe‘diamond’or‘spaceship’operatori.e,<>.Itisstandardpracticetodoso.<>operatorcanbeusedtowritetofilesaswell.canbealsobeusedinScalarandListcontext.Syntax:$x=;or$x=<>;Example:#!/usr/bin/perl-w usestrict;usewarnings;  print"Entersometext:";my$string=;  print"Youentered$stringasaString";Input:GeeksForGeeksOutput:Entersometext:GeeksForGeeks YouEnteredGeeksForGeeks asaStringIntheabovecode,aftergivingInput,thereisaneedtopressENTER.ThisENTERisusedtotellthecompilertoexecutethenextlineofthecode.But,takesthisENTERkeypressedasapartoftheInputgivenandhencewhenweprinttheline.AnewlinewillautomaticallybeprintedaftertheInputstring.Toavoidthis,afunctionchomp()isused.ThisfunctionwillremovethenewlinecharacteraddedtotheendoftheInputprovidedbytheuser.Example:#!/usr/bin/perl-w usestrict;usewarnings;  print"Entersometext:";my$string=;chomp$string;  print"Youentered$stringasaString";Input:GeeksForGeeksOutput:Entersometext:GeeksForGeeks YouEnteredGeeksForGeeksasaStringMyPersonalNotes arrow_drop_upSave LikePreviousPerl|printoperatorNext Perl|STDINinScalarandListContextRecommendedArticlesPage:06,Mar1913,Jun1913,Nov1917,Jun1909,Jul1928,Jul2002,Aug1802,May1903,Jul1930,May1929,Apr1926,Apr1928,Feb1913,Jul1820,Jun1820,Jun1820,Jun1825,Jun1818,Jul1826,Jun1828,Jun1803,Jul1803,Jul1803,Jul18ArticleContributedBy:Abhinav96@Abhinav96VotefordifficultyCurrentdifficulty: MediumEasy Normal Medium Hard ExpertArticleTags:Perl-Input-OutputPerlPracticeTags:PerlReportIssueWritingcodeincomment? 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