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Editor to share with you how to use perl's built-in function scalar, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

The built-in function scalar of perl

Scalar can find the length of an array, but there is no such item in the description of scalar.

Forces EXPR to be interpreted in scalar context and returns the value of EXPR.

English meaning: forces the expression EXPR to be interpreted in a scalar context.

Suppose I define an array @ arr= ("one", "two", "three") that returns its own length in a scalar environment.

Print @ arr; # list context, returns the @ arr element print scalar @ arr # forces the array arr in the scalar context, in which case the arr length is returned. The above is all the contents of the article "how to use scalar, the built-in function of perl". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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