FUNCTIONS

Question 1

How to define a function?

Answer 1

def hello():
      print('Howdy!')
       print('Howdy!!!')
       print('Hello there.')

Question 2

What does Define a function mean?

Answer 2

creating a function

Question 3

What does calling a function mean?

Answer 3

Using function

Question 4

what does passing a value mean?

Answer 4

giving a value to the function while calling it

Question 5

What is an argument in a function?

Answer 5

a value being passed to the function is an argument

Question 6

What is parameters?

Answer 6

Variables that have arguments assigned to them are parameters.

Question 7

What is return value of a function?

Answer 7

it. In general, the value that a function call evaluates to is called the return value of the function.

Question 8

What is return statement?

Answer 8

When creating a function using the def statement, you can specify what the return value should be with a return statement. A return statement consists of the following:

The return keyword
The value or expression that the function should return

Question 9

An example of a fortune teller program?

Answer 9

import random

def getAnswer(answerNumber):
    if answerNumber == 1:
        return "It is certain"
    elif answerNumber == 2:
        return "It is decidedly so"
    elif answerNumber == 3:
        return "Yes"

r = random.randint(1,3)
fortune = getAnswer(r)
print(fortune)

Question 10

What is None value?

Answer 10

which represents the absence of a value

Question 11

What are keyword arguments?

Answer 11

Keyword arguments are often used for optional parameters.

Question 12

What are print() keyword arguments?

Answer 12

print(‘the’,’cat’,’is’, sep =’ ,’,end =’ ‘ )

Question 13

what is the Call Stack by an example?

Answer 13

def a():
       print('a() starts')
    ➊ b()
    ➋ d()
       print('a() returns')

   def b():
       print('b() starts')
    ➌ c()
       print('b() returns')

   def c():
    ➍ print('c() starts')
       print('c() returns')

   def d():
       print('d() starts')
       print('d() returns')

➎ a()

Question 14

Parameters and variables that are assigned in a called function are said to exist in that function’s……..

Answer 14

local scope

Question 15

Variables that are assigned outside all functions are said to exist in the ………..

Answer 15

global scope

Question 16

variable that exists in a local scope is called a ……..

Answer 16

local variable

Question 17

a variable that exists in the global scope is called a ………

Answer 17

global variable

Question 18

when is a local variable created and destroyed?

Answer 18

A local scope is created whenever a function is called. Any variables assigned in the function exist within the function’s local scope. When the function returns, the local scope is destroyed, and these variables are forgotten.

Question 19

Why does scope matter?

Answer 19

Code in the global scope, outside of all functions, cannot use any local variables.
However, code in a local scope can access global variables.
Code in a function’s local scope cannot use variables in any other local scope.
You can use the same name for different variables if they are in different scopes. That is, there can be a local variable named spam and a global variable also named spam.

Question 20

If you need to modify a global variable from within a function, use the ………
code example?

Answer 20

global statement

def spam():
  ➊ global eggs
  ➋ eggs = 'spam'

Question 21

How to prevent errors from stopping the program execution?

Answer 21

Errors can be handled with try and except statements. The code that could potentially have an error is put in a try clause. The program execution moves to the start of a following except clause if an error happens.

Question 22

give and example of try - except

Answer 22

def spam(divideBy):
    try:
        return 42 / divideBy
    except ZeroDivisionError:
        print('Error: Invalid argument.')

print(spam(2))
print(spam(12))
print(spam(0))
print(spam(1))