Introduction to the context of little age 5-perl

Perl does not have various variable types like C/C ++. The variable type in Perl is determined by context, whether it is a string or an integer variable. For example, my $ para = @ _ # indicates the scalar context. $ para obtains the number of elements in. My ($ para) = @ _ # This is the context of the list. $ para gets the element value in. The specific context is determined by the variable type on the left of the equal sign, the scalar on the left of the equal sign, the scalar context, and the list context on the left of the equal sign. Force specify the scalar context to use the scalar function my @ A = (1 .. 10); print @ A; # print 1-10 print scalar @ A; # print 10, scalar is forced to the scalar context, and the number of elements is obtained. Only the scalar context is specified, and the list context is not specified!

 

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Introduction to the context of little age 5-perl