Teach Yourself Perl 5 in 21 Days, Second Edition is the ideal book for beginning - and intermediate - level users who want to gain a solid understanding of this programming language. Using step-by-step tutorials and the easy-to-follow approach, you can Teach yourself Perl 5 in 21 Days! Through various teaching elements, you'll learn everything you need to know about this popular programming language. You'll discover how to manipulate text, generate reports, and perform system tasks. Through practical, hands-on instructions, logically organized lessons, and helpful Q & A sections, you'll master Perl functions and concepts and be developing robust programs in no time. Plus, Do/Don't boxes show you how to avoid potential programming pitfalls, illustrations explain constructs such as associative arrays, and tables serve as handy references.
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Week at a Glance
Basic Operators and Control Flow
Understanding Scalar Values
66 other sections not shown
arguments ARGV array element array slice array variable assignment operator associative array bitwise BUG BUSTER character string child process chop command line conditional expression conditional statements contains converted count count++ create debugger default defined digits elsif enables equivalent error evaluated example executed exponent file variable filel filename floating-point number following statement foreach header hexadecimal input line inputline integer library function line of input loop machine MYFILE newline character nonzero notation Note null string octal operand option OUTFILE Output Analysis package parentheses pattern matches Perl interpreter Perl program print format printf programming language quiz reference result retrieve retval scalar value scalar variable socket specified standard input file standard output standard output file statement block STDIN STDOUT subarray subroutine subscript substring syntax system variable tells the Perl UNIX user ID usr/local/bin/perl value stored var1 var2 variable name waitpid words Write a program zero