学生笔记单元3 ibmaix教程au221s03.pdfVIP

StudentNotebook

Unit3.ElementaryInputandOutput

WhatThisUnitIsAbout

ThisunitintroducesthebasicinputandoutputusedinPerl

programs.

WhatYouShouldBeAbletoDo

Aftercompletingthisunit,youshouldbeableto:

•SendoutputtoSTDOUTwithprint

•GetinputfromSTDIN

•Usetheangleoperatorforinput

•Understandthechopandchompoperators

HowYouWillCheckYourProgress

•Hands-onlab

CopyrightIBMCorp.1997,1999Unit3.ElementaryInputandOutput3-1

Coursematerialsmaynotbereproducedinwholeorinpart

withoutthepriorwrittenpermissionofIBM.

StudentNotebook

Objectives

Aftercompletingthisunit,youshouldbeableto:

•SendoutputtoSTDOUTwithprint

•GetinputfromSTDIN

•Usetheangleoperatorforinput

•Understandthechopandchompoperators

Figure3-1.Objectives(AU221300T)

Notes:

3-2PerlProgrammingforAIXandOpenSystemsCopyrightIBMCorp.1997,1999

Coursematerialsmaynotbereproducedinwholeorinpart

withoutthepriorwrittenpermissionofIBM.

StudentNotebook

DefaultOutput

•Thebasicwayofproducingoutput

•DefaultdestinationisSTDOUT

•Syntax:

print$arg1,$arg2,$arg3

•Examples:

print′saygoodbye′;

print″HelloWorld!″;