Unit 7 : Python Function

Question 1

List out the types of function ( 2 )

Answer 1

1. Built-in functions provided by python ( input() , type() )
2. Functions that we define ourselves and use

Question 2

What should we add when creating a function?

Answer 2

1. Define a function using def keyword

Question 3

What is a function?

Answer 3

1. Some reusable code that takes arguments as input does some computation and then returns a results or results

Question 4

How can we call / invoke the function ?

Answer 4

1. By using function name, parenthesis and arguments in an expression

Question 5

What should we do when we are adding code to the function body?

Answer 5

1. Indent the body

Question 6

Will the function be executed like this?
def print_lyrics():
print (“I’m a lumberjack, and I’m okay. “)

Answer 6

1. No , it wasn’t called

• A functions is a stored and reuse pattern

Question 7

What is void functions also called as?

Answer 7

1. Non-fruitful Functions

Question 8

What is a fruitful function?

Answer 8

1. Functions that return value

Question 9

Come out an example of the pesudocode of function

Answer 9

Start
Prompt user for N
Read N
Call AVRG(10,5,N)
End
Function AVRG(n1,n2,n3)
Calculate sum = n1 +n2 + n3
Calculate result = sum/3
Print result
EndFunction

Question 10

What does the return statements do?

Answer 10

1. Ends the function execution and “sends back” the result of the function

Question 11

Come out an example of the pesudocode of function ( with return value )

Answer 11

Start
Prompt user for N
Read N
Call AVRG(10,5,N) returning average
Print average
End
Function AVRG(n1,n2,n3)
Calculate sum = n1 +n2 + n3
Calculate result = sum/3
return result
EndFunction

Question 12

What is an arguments?

Answer 12

1. Is a value we pass into the fucntion as its input when we call the function

Question 13

When we put arguments?

Answer 13

1. Put arguments in parenthesis after the name of the function

Question 14

Why should we use arguments?

Answer 14

1. So that we can direct the function to do different kinds of work when we call it at different times

greet(“Hello”#This is arguments )

Question 15

What is a parameter?

Answer 15

1. A variable which we use in the function definition that is a “handle” that allowd the code in the function to access the arguments for a particular function invocation

def greet(message # This is parameter )

Question 16

Can we define more than one parameter in function ?

Answer 16

1. Yes

Question 17

Do we need to match the number and order of arguments and parameters

Answer 17

1. Yes

Question 18

What are function with return value ?

Answer 18

1. Function that takes its arguments, do some computation and return a value to be used as the value of the function call in the calling expression

Question 19

What are the keywords used in functions that have return value?

Answer 19

1. return