Perl | Arrays (push, pop, shift, unshift) - GeeksforGeeks

Perl provides various inbuilt functions to add and remove the elements in an array. ... This function inserts the values given in the list at an ... 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ImproveArticle SaveArticle LikeArticle LastUpdated: 25May,2021ReadDiscussViewDiscussion ImproveArticle SaveArticle LikeArticle Perlprovidesvariousinbuiltfunctionstoaddandremovetheelementsinanarray.   FunctionDescriptionpushInsertsvaluesofthelistattheendofanarraypopRemovesthelastvalueofanarrayshiftShiftsallthevaluesofanarrayonitsleftunshiftAddsthelistelementtothefrontofanarray pushfunction  Thisfunctioninsertsthevaluesgiveninthelistatanendofanarray.Multiplevaluescanbeinsertedseparatedbycomma.Thisfunctionincreasesthesizeofanarray.Itreturnsnumberofelementsinnewarray.  Syntax:push(Array,list)Example:  Perl#!/usr/bin/perl #Initializingthearray@x=('Java','C','C++'); #PrinttheInitialarrayprint"Originalarray:@x\n"; #Pushingmultiplevaluesinthearraypush(@x,'Python','Perl'); #Printingthearrayprint"Updatedarray:@x";Output:  Originalarray:JavaCC++ Updatedarray:JavaCC++PythonPerl   popfunction  Thisfunctionisusedtoremovethelastelementofthearray.Afterexecutingthepopfunction,sizeofthearrayisdecrementedbyoneelement.Thisfunctionreturnsundefiflistisemptyotherwisereturnsthelastelementofthearray.  Syntax:pop(Array)Example:  Perl#!/usr/bin/perl #Initializingthearray@x=('Java','C','C++'); #PrinttheInitialarrayprint"Originalarray:@x\n"; #Printsthevaluereturnedbypopprint"Valuereturnedbypop:",pop(@x); #Printsthearrayafterpopoperationprint"\nUpdatedarray:@x";Output:  Originalarray:JavaCC++ Valuereturnedbypop:C++ Updatedarray:JavaC   shiftfunction  Thisfunctionreturnsthefirstvalueinanarray,removingitandshiftingtheelementsofthearraylisttotheleftbyone.Shiftoperationremovesthevaluelikepopbutistakenfromthestartofthearrayinsteadoftheendasinpop.Thisfunctionreturnsundefifthearrayisemptyotherwisereturnsfirstelementofthearray.  Syntax:shift(Array)Example:  Perl#!/usr/bin/perl #Initializingthearray@x=('Java','C','C++'); #PrinttheInitialarrayprint"Originalarray:@x\n"; #Printsthevaluereturned#byshiftfunctionprint"Valuereturnedbyshift:",                        shift(@x); #Arrayaftershiftoperationprint"\nUpdatedarray:@x";Output:  Originalarray:JavaCC++ Valuereturnedbyshift:Java Updatedarray:CC++   unshiftfunction  Thisfunctionplacesthegivenlistofelementsatthebeginningofanarray.Therebyshiftingallthevaluesinanarraybyright.Multiplevaluescanbeunshiftusingthisoperation.Thisfunctionreturnsthenumberofnewelementsinanarray.  Syntax:unshift(Array,List)Example:  Perl#!/usr/bin/perl #Initializingthearray@x=('Java','C','C++'); #PrinttheInitialarrayprint"Originalarray:@x\n"; #Printsthenumberofelements#returnedbyunshiftprint"Noofelementsreturnedbyunshift:",                   unshift(@x,'PHP','JSP'); #Arrayafterunshiftoperationprint"\nUpdatedarray:@x";Output:  Originalarray:JavaCC++ Noofelementsreturnedbyunshift:5 Updatedarray:PHPJSPJavaCC++ MyPersonalNotes arrow_drop_upSave LikePreviousPerl|ArraySlicesNext PerlListanditsTypesRecommendedArticlesPage:02,Apr1915,Mar1928,Mar1928,Feb1913,Jun1913,Nov1928,Jun1809,Apr1922,Jul1918,Jun2002,Aug1802,May1903,Jul1930,May1929,Apr1926,Apr1928,Feb1913,Jul1820,Jun1820,Jun1820,Jun1825,Jun1818,Jul1826,Jun18ArticleContributedBy:rupanisweety@rupanisweetyVotefordifficultyEasy Normal Medium Hard ExpertImprovedBy:sweetytyArticleTags:Perl-ArraysPickedPerlPracticeTags:PerlReportIssueWritingcodeincomment? 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