perl xor

one. DataType (data type ):Perl's data types are roughly four: Scalar (variables), Scalar Array (array), hash array (hash), References (pointer), but they seem to be small but more than sufficient. In particular, you can write a Perl program without

I. Data Types(Data type): Perl has four data types: Scalar (variable), Scalar Array (Array), Hash Array (Hash), and References (pointer ), it seems to be rare, but it is more than enough to use it. Especially when writing Perl programs, you do not

Before studying the basics of Perl, we would like to have a chance to see the following Perl introduction. Baidu Encyclopedia First, basic types of Perl The basic type of per is divided into two types: numeric type and string type. Numeric types can

1.Perl Array (1): 1 Initialize the array @array = ("Stringa", "StringB", "STRINGC");(2) using negative index loop to retrieve print $array [-1]; #输出索引为 (-1 + 3)% 3 = 2 STRINGC3 Dynamic growth $array [4] = "STRINGD"; #虽然 $array [3] has not yet been

1. Simple Variables ============== 1. Integer$ X = 123456;Perl stores integer data in floating-point registers. In fact, integer variables are treated as floating-point numbers in Perl, but they are only a special column of floating-point data.The

Arithmetic operators: + (plus),-(minus), * (multiply),/(except), * * (Power),% (take more),-(Monocular negative) (1) The cardinality of the power can not be negative, such as ( -5) * * 2.5 # error; (2) The result of power can not exceed the limit of

Perl:Practical Extractionand Report Language, practical reports extraction language.Borrowing the features of C, sed, awk, Shell, and many other programming languages is the Dream scripting language for Linux and UNIX. Used primarily for text

To include double quotes or backslashes in the string, add a backslash before it, and the backslash can also cancel the variable substitution Single quotes another feature that can span multiple lines, such as:$text = ' This is twoLines of text';is

1. Numeric Operators: + (Plus),-(minus), * (multiplication),/(Division), ** (multiplication party/power), % (remainder );These operators mix integers, floating-point numbers, and real numbers. The calculation results are in the correct numeric

One, arithmetic operators: + (plus),-(minus), * (multiply),/(except), * * (UP),% (remainder),-(Monocular negative) (1) The base of the exponentiation can not be negative, such as ( -5) * * 2.5 # error;(2) The result of a exponentiation cannot exceed