Eighth Python custom Function return value

Note Custom functions: function names within a unified file cannot be the same.

Single return value

Syntax structure:

def function_name ([para1,para2 ...])

Code ...

Code ...

...

Return value--------------A value can be returned

eg

def test_c (n1,n2):-------------function definition
N=n1+n2
return n

Sum1=test_c (100,102)----------function call----It is best not to use sum because the sum is the keyword
print ' sum1= ', sum1

The sun1 is used to accept the return value of a function. The custom function has a return value, and a variable to hold or accept the return value when called

Multiple return values

eg

Syntax structure:

def function_name ([para1,para2 ...])

Code ...

Code ...

...

Return Value1,value2,value3:--------------can return multiple values, comma interval

eg

def test_d (N1,N2):
N=n1+n2
M=n1*n2
P=n1-n2
E=n1**n2
Return n,m,p,e

Sum1,multi,plus,pow=test_d (2,10)-----------preferably in this form
Print Sum1,multi,plus,pow

You must have the same number of variables to hold the return value of the function.

If the keynote function has only one variable, the amount of change is stored in tuples.

eg

Re=test_d (2,10)

Print RE

The results are as follows:

(12,20,-8,1024)-----parentheses surround the tuple

Print re[0],re[1],re[2],re[3]---------------elements used to print tuples

Eighth Python custom Function return value