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This article mainly introduces how to use python standard function def, has a certain reference value, interested friends can refer to, I hope you have a lot of gains after reading this article, let Xiaobian take you to understand.

standard function def

You can define a function that you want to function, here are some simple rules:

The function code block begins with the def keyword, followed by the function identifier name and parentheses ().

Any incoming arguments and arguments must be enclosed in parentheses, which can be used to define parameters.

The first line of the function can optionally use a document string-used to store the function description.

Function content starts with a colon and is indented.

return [expression] terminates the function, optionally returning a value to the caller. Return without an expression is equivalent to returning None.

Grammar:

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