Working with Functions Sumita Arora Practical Solution Class 12 Computer science

Working with Functions Sumita Arora Practical Solution Class 12 Computer science

P.I.P :- 3.1

Q1. Carefully go through following sample code and identify various parts of functions.
(a)
def sub1(a, b):
    print (b, "-", a, " = ", b - a)
(b)
def cube2(x):
    x*x*x
    return x*x*x-x
(c)
def cube1(x):
    return x*x*x
(d)
def greeting():
    print("Welcome to Python")

Q2. There are some function call statements given below. Pick the function call statements for the
function definitions given in question 1:
(a) subtract(3, 5)
(b) cube2(7, x)
(c) sub(5, 3)
(d) cubel(a, a, a)
(e) greetings('hello')
(f) sub2(8,9)
(g) greeting()
(h) sub1(x, y)
(i) cube1(x)
(j) sub2(p, q)
(k) sub1(5,3)
(l) cube2(num)
(m) sub1(8,9,10)
(n) cube(7)
Function call statements for sub1()
Function call statements for cube1()
Function call statements for cube2()
Function call statements for greeting()

Q3. If you carefully observe the function definitions of question1, you'll find functions sub1() and cube2() are basically doing the same thing - calculating difference between two values. Logically they are doing same thing but technically these are different. What is the difference?

P.I.P :- 3.2

Q1. Identify the mentioned parts from the code given below.
1. def lastDigitCube(n) :
2. d = n % 10
3. c = d ** 3
4. return c
5.
6. number = int(input("Enter a number :") )
7. cube lastDigitCube(number)
8. print("The cube of its last digit is", cube)

 



 
	 
(a)
 
	 
Function header
 
	 
 
 
 
	 
(b)
 
	 
Number & name of arguments
 
	 
 
 
 
	 
(c)
 
	 
Number of statements in function body
 
	 
 
 
 
	 
(d)
 
	 
Number of statements in main program (__main__)
 
	 
 
 
 
	 
(e)
 
	 
Function call statement
 
	 
 
 
 
	 
(f)
 
	 
Parameters' name
 
	 
 
 
 
	 
(g)
 
	 
Arguments' name
 
	 
 
 
 
	 
(h)
 
	 
Flow of execution[mention the execution order of statements e.g., main.1 means main program's statementl executed and fn.1 means function's statementl executed. A sample order could be main.1, fn.1, main.2 etc. (This flow of execution is not for above code : p)]
 
	 
 
 

Q2. Consider the following function definitions. Write appropriate function call statements for these.

[Hint: Be careful about which function calls should be part of some expression or statement]

 

 
	 
S.No.
 
	 
Function Definition
 
	 
Function Call
 
 
 
	 
(a)
 
	 
def sumof3Multiplesi(n):
    s = n * + 1 + n * 2 + n * 3
    return s
 
	 
 
 
 
	 
(b)
 
	 
def sumof3Multiples2 (n) :
    s = n + 1 + n * 2 + n * 3
    print(s)
 
	 
 
 
 
	 
(c)
 
	 
def areaOfSquare(a) :
    return a * a
 
	 
 
 
 
	 
(d)
 
	 
def areaOfRectangle (a, b) :
    return a * b
 
	 
 
 
 
	 
(e)
 
	 
def perimeterCircle(r):
    return (2 * 3.1459 * r)
 
	 
 
 
 
	 
(f)
 
	 
def perimeterRectangle(l, b) :
    return 2 * (l + b)
 
	 
 
 
 
	 
(g)
 
	 
def Quote():
    print("\t Quote of the Day")
    print("Act Without Expectaton!")
    print("\t-Lao Tzu")
 
	 
 
 
 
	 
(h)
 
	 
def poly(x, y, z):
    s = x ** 3 + y ** 2 + z
    return s
 
	 
 
 

Q3. For the function definitions given in question 2 here, write main program segment for function definitions numbered given below:
S.No. Function Definition Main Program
(a) def sumof3Multiplesi(n):
    s = n * 1 + n * 2 + n * 3
    return s
(b) def sumof3Multiples2( n ) :
    s = n * 1 + n * 2 + n * 3
    print(s)
(c) def Quote():
    print("\t Quote of the Day")
    print("Act Without Expectation!")
    print("\t-Lao Tzu")
(d) def poly(x, y, z):
    s = x ** 3 + y ** 2 + z
    return s

Q4. Define a Python function called absolute that takes one parameter (x) and returns the absolute value of x, i.e., as shown below:

|x| = (x if x ≥ 0, -x otherwise)

Don't forget to use a return statement at the end.
Also, write the code that will demonstrate math absolute function by computing and print the absolute value of 6 and -3. Be sure to pay attention to proper indentation.

Q5. Write a program chkOdd() that takes one argument and report if the argument is odd or not.

P.I.P :- 3 .3

Q1. Consider the following code. Identify the types and values of arguments being passed for each
function call.

def func( a, b = 5, c = 10):
    poly = 2 * a ** 2 - 5 * b + c
    print("With values", a, b, c)
    print(poly)

func(3, 7)  # function call 1
func(25, c = 24)    # function call 2
func(c = 50, a = 100)   # function call 3

Types of arguments: Types of arguments: Types of arguments:
Function call 1 a gets b gets c gets
Function call 2 a gets b gets c gets
Function call 3 a gets b gets c gets

Q2. What will be the output produced by above program (given in question 1)?

Q3. Consider following function header

def robot (voltage, state = 'a stiff', action='voom', type = 'Norwegian Blue'):

For the above function, some function calls are being given below. Find the errors in these function call statements :

Function call State reason(s) for these calls being invalid
(a) robot()
(b) robot (voltage = 5.0, 'dead)
(c) robot (110, voltage = 220)
(d) robot (actor = 'Harrison Ford')

Q4. What is wrong with following function code? Find reason and correct it.

def addThree (n1, n2, n3):
    return n1 + n2 + n3
    print("the answer is", n1 + n2+ n3)

Reason :-
Corrected code :-

Q5. Following code is giving an error at line number 6. Why is this error occurring? What is the solution?

1. def c_to_f(c):
2. result = c/5.0 * 9 + 32
3. return result
4.
5. tempf = c_to_f(19)
6. print(result)

Reason :-
Corrected code :-

Q6. Given some programs below. Write their flow of execution.

Program code Flow of Execution
1. def square(x):

2.      return x *x

3.

4. square(5)
1. def square(x): 

2. return x * x

3.

4. print(square(5) + square(6))
1. def square(x):2. return x * x

3.

4. def sum of squares (x, y) :

5. return square (x) + square(y)

6.

7. k = sum_of_squares (2, 3)

8. print("sum is", k)

Q7. From the program given below, identify the scope of each variable in the program.
x = 10 # Reference 1
pi = 3.14
def incr(x): # Reference 2
y = x + 1
return y
def area(r):
n = incr(r)
ar =pi * n * n
return ar
incr(5)
print(x)
area(4)

Q8. Write a function that takes a character and returns true if it is a vowel, false otherwise.

Q9. Write a program that passes value to  a function mersenne() and the function return nth mersenne number.

Q10. Write a void function that receives a 4-digit number and calculate the sum of the square of first 2 digits number and last digits number.

Q11. Write a function that takes one argument and report if the argument is prime or not. Write a program that invokes this function.

P.I.P :- 3.4

Q1. Consider following program code.
1. def myFunc (l, v)
2. l[0] +=2
3. V +=2
4. print("Values/variables within called function :”, l , v)
5. return
6. #__main__
7. list1 = [1]
8. var1 = 1
9. print("Values/variables before function call:", list1, var1)
10. myFunc(list1, var1)
11. print("Values/variables after function call:", list1, var1)

(i) Identify flow of execution in the above program.
(ii) What will be the output of above program?
(iii) What is reason of this output?

Q2. Consider following program code, which is similar to the previous program but the function myfunc() has some changes as shown below:
1. def myFunc(list1, var1):
2. list1[0] += 2
3. var1 += 2
4. print("Values/variables within called function :", list1, var1)
5. return
6. #__main__
7. list1 = [1]
8. var1 = 1
9. print("Values/variables before function call:", list1, var1)
10. myFunc(list1, var1)
11. print("Values/variables after function call:", list1, var1)

(i) Identify flow of execution in the above program.
(ii) What will be the output of above program?
(iii) What is reason of this output?
(iv) Try making memory environment(s) for above program.

Q3. Consider following program code.
1. def myFunc(1, v):
2. l[0] += 2
3. v += 2
4. N = [2, 3, 4]
5. l = N
6. l.append(7)
7. print(l, v)
8. return
9. #__main__
10. list1 = [1]
11. var1 = 1
12. print("Values/variables before function call:", list1, var1)
13. myFunc(list1, var1)
14. print("Values/variables after function call: ", list1, var1)
(i) Identify flow of execution in the above program
(ii) What will be the output of above program?
(iii) What is reason of this output?
(iv) Try making memory environment(s) for above program.