CS Assignment1

1.      Write a program to input a number and generate the mathematical table of that number only if that number is divisible by 2.

Ans:

num = int(input("Enter a number: "))

if num % 2 == 0:

    print(f"Multiplication Table of {num}")

    for i in range(1, 11):

        print(num,"x",i,"=",num*i)

else:

    print("The number is not divisible by 2. Table cannot be generated.")

2.      Akshat is a of class XI. He has written a program for manipulating string. Fill the blank with appropriate command / method

myaddress="Wazirpur 1, New Yamuna Nagar, New Delhi"

for i in range(         )      #line 1

if myaddress[i].                :         #line 2 print(myaddress[i].upper(), end="")

elif myaddress[i].                   :    # line 3

      print("*",end="")

else:

print(myaddress[i],end="")

             print()

print(len(myaddress.split(","))) #line 4

print(myaddress.replace("New","Old")) #line 5

a. Fill in the blank in Line 1 to calculate length of string

b.  Write the function in line 2 to check lower letter.

c. Write the function in line 3 to check digit.

d.      What will be the output of line 4.

OR

e.  What will be the output of line 5.

Ans

a. Fill in the blank in Line 1 to calculate length of string

len(myaddress)

b. Function in Line 2 to check lower letter

islower()

c. Function in Line 3 to check digit

isdigit()

d. Output of Line 4

print(len(myaddress.split(",")))

OR

d. Output of Line 5

print(myaddress.replace("New", "Old"))

Final Filled Code (for clarity)

myaddress = "Wazirpur 1, New Yamuna Nagar, New Delhi"

for i in range(len(myaddress)):

    if myaddress[i].islower():

        print(myaddress[i].upper(), end="")

    elif myaddress[i].isdigit():

        print("*", end="")

    else:

        print(myaddress[i], end=""

print()

print(len(myaddress.split(",")))

print(myaddress.replace("New", "Old"))

3.      Mr Arvind is software developer and works with infotech Company Ltd Noida. He has assigned to Create a dictionary with the roll number, name and marks of n students in a class and display the names of students who have marks above 75. How he can write the correct python code for the same.

Ans:

n = int(input("Enter number of students: "))

students = {}

for i in range(n):

    roll = int(input("Enter roll number: "))

    name = input("Enter student name: ")

    marks = float(input("Enter marks: "))

    students[roll] = {"Name": name, "Marks": marks}

print("\nStudents scoring above 75 marks:")

for roll in students:

    if students[roll]["Marks"] > 75:

        print(students[roll]["Name"])

4.      Write a program in Python, which accepts a list L of integers and displays the sum of all such integers from the list L which end with the digit 3.

For example, if the list L is [ 123, 10, 13, 15, 23] then the program should display the sum of 123, 13, 23, i.e. 159 as follows: Sum of integers ending with digit 3 = 159

Ans:

L = eval(input("Enter a list of integers: "))

sum3 = 0

for num in L:

    if num % 10 == 3:

        sum3 += num

print("Sum of integers ending with digit 3 =", sum3)

5.      Write a program to check whether an integer input by the user is a 5-digit number and whether it is prime or composite.

Ans:

num = int(input("Enter an integer: "))

# Check whether the number is 5-digit

if 10000 <= abs(num) <= 99999:

    print("The number is a 5-digit number.")

    # Check prime or composite

    if num > 1:

        for i in range(2, int(num**0.5) + 1):

            if num % i == 0:

                print("The number is Composite.")

                break

        else:

            print("The number is Prime.")                                                                                                          

    else:

        print("The number is neither Prime nor Composite.")

else:

    print("The number is not a 5-digit number.")

6.      Create a password validation program that asks the user for a password and checks if a given password meets the following criteria:

·         At least 8 characters long

●        Contains both uppercase and lowercase letters

●        Has at least one digit

●        Includes at least one special character given (@,#,$, !,*,<,>)

Accept the password if it meets the above criteria otherwise continue accepting new password.

Ans:

while True:

    pwd = input("Enter password: ")

    upper = lower = digit = special = False

    if len(pwd) >= 8:

        for ch in pwd:

            if ch.isupper():

                upper = True

            elif ch.islower():

                lower = True

            elif ch.isdigit():

                digit = True

            elif ch in "@#$!*<>":

                special = True

        if upper and lower and digit and special:

            print("Password accepted")

            break

        else:

            print("Password does not meet all conditions")

    else:

        print("Password must be at least 8 characters long")

7.      Write a program to input few names in a list and create a menu driven program to:

a.       Display the words that starts with vowels

b.      Display the words that starts and ends with same vowel

c.       Display the words that ends with a consonant

d.      Display those words that starts and ends with same consonant

Ans:

names = eval(input("Enter list of names: "))

vowels = "aeiou"

while True:

    print("\nMENU")

    print("1. Words that start with vowels")

    print("2. Words that start and end with same vowel")

    print("3. Words that end with a consonant")

    print("4. Words that start and end with same consonant")

    print("5. Exit")

    choice = int(input("Enter your choice: "))

    if choice == 1:

        print("Words starting with vowels:")

        for w in names:

            if w[0].lower() in vowels:

                print(w)

    elif choice == 2:

        print("Words starting and ending with same vowel:")

        for w in names:

            if w[0].lower() in vowels and w[-1].lower() in vowels and w[0].lower() == w[-1].lower():

                print(w)

    elif choice == 3:

        print("Words ending with a consonant:")

        for w in names:

            if w[-1].lower() not in vowels:

                print(w)

    elif choice == 4:

        print("Words starting and ending with same consonant:")

        for w in names:

            if w[0].lower() not in vowels and w[-1].lower() not in vowels and w[0].lower() == w[-1].lower():

                print(w)

    elif choice == 5:

        print("Program terminated.")

        break

    else:

        print("Invalid choice. Try again.")

8.      Akash wants to store some information about his class. He wants to save this data in a dictionary where the name of the student is the key and the marks of 5 subjects along with their total marks, as the value (in a list). Help him by performing the following task as asked in order.

●        Accept the name, and marks of 5 subjects out of 100 in a list for n students and store it in a dictionary as asked.

●        Then, calculate the total marks out of 500 for each student and add it at the end of the list (value of each dictionary)

●        Then, Display the name of the students who secured more than 400 out of 500.

Ans:

students = {}

n = int(input("Enter number of students: "))

for i in range(n):

    name = input("Enter student name: ")

    marks = []

    print("Enter marks of 5 subjects:")

    for j in range(5):

        print("Subject ",j+1,end=": ")

        m = int(input())

        marks.append(m)

    total = sum(marks)

    marks.append(total)

    students[name] = marks

print("\nStudents scoring more than 400 out of 500:")

for name in students:

    if students[name][-1] > 400:

        print(name)

 

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