python function (1) fixed collocation and knowledge points of function

Function basis

def  fun(name,age):
    message= "my  name is {},I am {} years old.".format(name,age)

    print(meaasge)
    
    print(meaasge,50)
    return
fun(10,20)

def is the declaration of the function;
fun is the name of the function;
the name and age in the parentheses are the parameters of the function;
and the print line is the main part of the function, and the corresponding statement can be executed;
at the end of the function, you can return the call result (Return or yield), or not to return.

Function parameters

Function return

The function does not need to return, if there is no return value, the return value of the function is None

Functions can return numbers, strings, lists, tuples, dictionaries, collections

If multiple values ​​are returned, the returned value will be returned as a tuple

The return statement represents the end of the function execution, and the function does not perform the operation after the return statement