Python Basic Learning (ii)--functions

return value:

The Python function has a return value, there is no return in the function body, the default return value is None,

Function parameters:

1. General Parameters

According to the order, the actual parameters are assigned to the formal parameters, each corresponding.

Cases:

def send (xxx,z,content):
    Print (xxx,z,content)

Send ("yy", "dd", ' Niubi ')

2. Default parameters

Must be placed at the end of the parameter list, and the actual parameters can be defaulted and overwritten.

Cases:

def send (xxx,z,content=123):
    Print (xxx,z,content)

Send ("yy", "dd", ' Niubi ')
Operation Result:
YY DD Niubi

3. Specify parameters

The actual parameter is assigned to the specified formal parameter.

Cases:

def send (xxx,z,content=123):
    Print (xxx,z,content)

Send (z= "yy", xxx= "DD")
Operation Result:
DD YY 123

Python Basic Learning (ii)--functions