Does Python function always returns a value?

What is the output of the code below?

def demo(name, age):

    print(name, age)

demo("Jessica",28)

def addition(num):        # line 1

    print(num + 25)          # line 2

fun(5)                                     # line 3

Identify which line of code has an error?

def subtraction(num)”                  # line 1

    print(25 – num )                           #line 2

subtraction(5)                                   # line 3

Identify which line of code has an error?

What is the output of the  code below?       

def subtraction(num):               

    print(25 – num )                        

subtraction(5)             

Select which is true about Python function.

What is the output of the code below?

def addition(num): 

    print(num + 25)   

addition(5)                      

What is the output of the following function call?

def demo(name, age=20):

    print(name, age)

demo('Emma', 25)

Select which is true for a parameter.

Select which statement is true about Python function.