Some Understanding of return and print in python, pythonreturnprint

Some Understanding of return and print in python, pythonreturnprint

Preface

I recently started to learn python. I only had some c basics and I forgot about it. Now I want to learn and share my ideas ~ I read the return usage while reading the book, but it is mixed with print later. I always feel that the return value of the function can be directly displayed, but this is not the case. Next, let's take a look at the understanding of return and print in python. Let's take a look at the detailed introduction.

See an example:

Code (1)

x = 1y = 2def add (x, y):　　z = x + y　　return zprint （add(x,y)）

Code (2)

x = 1y = 2def add (x, y):　　z = x + y　　print zprint （add(x,y)）

Output result (Same)

>>> 3

Here, the result of code 1 is obtained by printing the return value, and the result of Code 2 is printed in the functionadd (x, y),add (x, y)When the print z statement is executed, the returned value is None, so the output result should be

3None

The return value can only be printed. For example

def a():　　print('ss')def b():　　return 'ss'

Run directlya() And runs directly with results.b()There is no result, only runprint(b())To display 'ss '.

In addition, assign a function to a variable to obtain the return value.b() , Add

c=b()c

There is a result, because c getsb()The return value is 'ss '.

In the interactive mode, the return result is automatically printed, and the print function is required for the script to be run independently.

Summary

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