Perl While Loop Syntax Error
PerlNews Q&A Tutorials Poetry RecentThreads NewestNodes Donate What'sNew on Feb 15, 2012 at 10:10UTC ( #953894=perlquestion: print w/replies, xml ) Need Help?? MVRS has asked for perl syntax error near the wisdom of the Perl Monks concerning the following question: hi perl if monks thanks in advance please let me know abt the error in the code am unable to understand as am not that regular to the scripting , am getting the following error syntax error at Blast_parsing.pl line 32, near ") {" syntax error at Blast_parsing.pl line 88, near "}" #!/usr/local/bin/perl #The Script will parse a NCBI Blastx output file and output the top N +hits of each blast result. #For each hit following results are reported #Accessionnumber, Length, Description, Evalue, Bitscore, Queryframe, Q +ueryStart, QueryEnd, Hit end, positives & identicals #The results are delimited & ready for import into a spread sheet prog +ram for browsing & further analysis. #use strict; use warnings; use Bio::SearchIO; #Usage information die "Usage:$0
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A • B • C • D • E F • G • H • I • L M • N • O • P • S T • http://perldoc.perl.org/perlsyn.html U • X perlsyn Perl 5 version 24.0 documentation Go to top • Download PDF Show page index • Show recent pages Home > Language reference > perlsyn Please https://affy.blogspot.com/p5be/ch16.htm note: Many features of this site require JavaScript. You appear to have JavaScript disabled, or are running a non-JavaScript capable web browser. To get the best experience, please syntax error enable JavaScript or download a modern web browser such as Internet Explorer 8, Firefox, Safari, or Google Chrome. Recently read perlsyn NAME DESCRIPTIONDeclarations Comments Simple Statements Truth and Falsehood Statement Modifiers Compound Statements Loop Control For Loops Foreach Loops Basic BLOCKs Switch StatementsGoto The Ellipsis Statement PODs: Embedded Documentation Plain Old Comments (Not!) Experimental Details on given perl while loop and whenNAME perlsyn - Perl syntax DESCRIPTION A Perl program consists of a sequence of declarations and statements which run from the top to the bottom. Loops, subroutines, and other control structures allow you to jump around within the code. Perl is a free-form language: you can format and indent it however you like. Whitespace serves mostly to separate tokens, unlike languages like Python where it is an important part of the syntax, or Fortran where it is immaterial. Many of Perl's syntactic elements are optional. Rather than requiring you to put parentheses around every function call and declare every variable, you can often leave such explicit elements off and Perl will figure out what you meant. This is known as Do What I Mean, abbreviated DWIM. It allows programmers to be lazy and to code in a style with which they are comfortable. Perl borrows syntax and concepts from many languages: awk, sed, C, Bourne Shell, Smalltalk, Lisp and even English. Other languages have borrowed syntax from Perl, particularl
Wet 02-Numeric and String Literals 03-Variables 04-Operators 05-Functions 06-Statements 07-Control Statements 08-References Part II: Intermediate Perl 09-Using Files 10-Regular Expressions 11-Creating Reports Part III: Advanced Perl 12-Using Special Variables 13-Handling Errors and Signals 14-What Are Objects? 15-Perl Modules 16-Debugging Perl 17-Command line Options Part IV: Perl and the Internet 18-Using Internet Protocols ftplib.pl 19-What is CGI? 20-Form Processing 21-Using Perl with Web Servers 22-Internet Resources Appendixes A-Review Questions B-Glossary C-Function List D-The Windows Registry E-What's On the CD? 16 - Debugging Perl This chapter is about errors: how to find them and how to fix them. No programmer I've ever known of is able to consistently create perfect programs. So don't feel bad if you also have some problems you need to solve. I've spent many hours looking for a missing closing bracket or a misspelled variable name. There are two different types of errors: syntax errors and logic errors. Syntax errors are made as you type your script into an editor. For example, you might not add a closing quote or might misspell a filename. Logic errors are more insidious and difficult to find. For example, you might place an assignment statement inside an if statement block that belongs outside the block. Or you might have a loop that runs from 0 to 100 when it should run from 10 to 100. Accidentally deleting the 1 or not entering it in the first place is very easy. Syntax errors are usually easy to fix. The section "Common Syntax Errors" discusses some common syntax errors. You'll see how to decipher some of Perl's error messages. Logic errors can be very hard to fix. They are discussed in the section "Logic Errors." While there is no magic wand to wave over a program that will identify logic errors, there are some tools that can help - like the debugger. A debugger is an environment that lets you execute your program line by line. This is also called single-stepping through your program. You can also display or modify the value of variables. The debugger i