Definition and invocation of functions in Python

1. Why use a function?

(1) Too many code repetitions (2) Poor readability

Benefits of using Functions:

(1) Code reuse

(2) Maintain consistency, easy maintenance

(2) Scalability

2. Initial function definition and invocation

definition of a function

  def Test (x):       " The function Definitions "       x+=1      return x         def : Defines a keyword  for a function "" : Document description (not necessary, but strongly recommend adding descriptive information for your function) x+=1: Refer tocode block or program processing logic return  : Define return value call run: can take parameters or do not have function name ()

Definition and invocation of functions in Python