Fundamentals of Computer Programming(Apply computer programming techniques to solve real world problems by Python)

 

Question #1:

Write a python program that takes balance of a user’s account as input. It should then ask the user how much amount he\she wants to withdraw from his\her account. The program should take this amount as input and deduct from the balance. Similarly, it should ask the user how much amount he\she wants to deposit in his\her account. It should take this amount as input and add to the balance. The program shall display the new balance after amount has been withdrawn and deposited.

Note: Your program should have all necessary checks on the transactions. Display a menu to the user to let him\her choose between different available options.

Solution:

Copy of Source Code:

#program to calculate current balance after withdrawal and deposit

balance=get=w=d=0 #variables required

yn="y"

balance=eval(input("Enter your account balance: ")) #input balance

#menu for the withdrawal

print("For the withdrawal")

print(" 1 is to withdraw Rs.500")

print(" 2 is to withdraw Rs.1000")

print(" 3 is to withdraw Rs.1500")

print(" 4 is to withdraw Rs.2000")

get=eval(input("Enter the number corresponding to the amount you want to withdraw: ")) #input get

#if statement to decide value of w

if get==1 :

    w=500

elif get==2:

    w=1000

elif get==3:

    w=1500

elif get==4:

    w=2000

else:

    print("\nInvalid Input. Proceeding to deposit.\n") #displayed when wrong input

if w>balance:

    #program course of action when withdrawal is more than balance

    print("You can not withdraw more than your balance.")

    yn=input("If you wish to proceed to deposit, enter Y if not then enter N: ")

    #choice to user if he/she wants to still deposit or not

    if yn=="Y":

     print("For the deposit")

     print(" 1 is to deposit Rs.500")       

     print(" 2 is to deposit Rs.1000")

     print(" 3 is to deposit Rs.1500")

     print(" 4 is to deposit Rs.2000")

     get=eval(input("Enter the number corresponding to the amount you want to deposit: "))

     if get==1:

        d=500

     elif get==2:

        d=1000

     elif get==3:

        d=1500

     elif get==4:

        d=2000

     else:

        print("Invalid Input.")

        input("Press Enter to exit.")

     balance=balance+d

     print("Your current balance is", balance)

    else:

     print("Exit.")

else:

    #program course of action when withdrawal not less than deposit

    balance=balance-w

    print("For the deposit")

    print(" 1 is to deposit Rs.500")       

    print(" 2 is to deposit Rs.1000")

    print(" 3 is to deposit Rs.1500")

    print(" 4 is to deposit Rs.2000")

    get=eval(input("Enter the number corresponding to the amount you want to deposit: "))

    if get==1:

        d=500

    elif get==2:

        d=1000

    elif get==3:

        d=1500

    elif get==4:

        d=2000

    else:

        print("Invalid Input.")

        input("Press Enter to exit.")

    #final value of balance

    balance=balance+d

    print("Your current balance is", balance) #to display balance

    input("Press Enter to exit.")

 

Question #2:

Write a Python code:

1.      To take the marks of 5 subjects from the user and store them in different variables.

2.      Find the average of the marks.

3.      Decide the grade based on the average of them marks.

Solution:

Copy of Source Code:

# program to display grade based on average of 5 marks from user

eng=urd=math=sci=comp=1

print ("Enter marks less than or equal to 100 for the following subjects:-")

eng=eval(input("English: ")) #this gets the marks for english

urd=eval(input("Urdu: ")) #this gets the marks for urdu

math=eval(input("Maths: ")) #this gets the marks for maths

sci=eval(input("Science: ")) #this gets the marks for science

comp=eval(input("Computer: ")) #this gets the marks for compputer

 

# if statement to ensure all marks are not greater than 100

if(urd>100 or eng>100 or math>100 or comp>100 or sci>100):

    print("Wrong input.")

else: # if input is correct, the following calculation will be done

    avg=(eng+urd+comp+sci+math)/5

    #the decision statement displays grade according to the following criteria of average

    #A if >=90

    #B if >=80

    #C if >=70

    #D if >=60

    #E if >=50

    #F if < 50

    if avg>=90:

        print("Your grade is A")

    elif avg>=80:

        print("Your grade is B")

    elif avg>=70:

        print("Your grade is C")

    elif avg>=60:

        print("Your grade is D")

    elif avg>=50:

        print("Your grade is E")

    else:

        print("Your grade is F") #this displays F if none of the above conditions are met

input("Press enter to exit:") #for the output to pause until user presses enter

 

Question #3:

Describe the strengths and weaknesses of python as a modern programming language while highlighting its dominant application areas (300-500).

Solution:

Python is undoubtedly the most popular programming language in the world as of right now. That is because there are countless advantages of coding in python but there are also some areas where python exhibits weakness.

To discuss the strengths of python, the most important reason why it is popular is because it is easy to learn. Beginners can code various things without knowing the specifics such as memory references and all the low-end details. Python offers the programmers access to a large number of modules and ready constructs. Consequently, the programmer can focus on the logic of the program and the task at hand without using up a lot of time on writing the code which provides increased productivity. There are a lot of online resources available for use when it comes to python. These include libraries for machine learning, artificial intelligence (AI) and a lot of other fields. One code written in python can be used anywhere i.e., Mac, Windows, Linux, Unix. Python is also open source and free of cost. It is public to modify and redistribute. Python is interpreted so this line-by-line execution provides ease of debugging. All of these specifications make python a strong modern programming language.

Although it has many advantages, python can also be disadvantageous in some regards. Python is interpreted and executed line by line. This causes it to be relatively slow as compared to other languages like C/C++ and low-level languages. For this purpose, it is not as efficient when it comes to 3D rendering in game development. Other than this, python is weak in the field of mobile computing. Python also needs some more testing time. Some bugs are only detectable during run time. As python is flexible when it comes to data types, the memory consumption is high so it is not a good choice for memory intensive tasks. In addition to this, the libraries available for python are not competent with other programming languages. Most programming languages have a strong syntax but python does not. This results in difficulty while translating a program into another programming language.

Being a popular and strong language, python is used in many fields and its application areas are considerably increasing. It is a leading choice when it comes to developing web applications. Instagram and Dropbox were originally built on python. It is also used for creating Graphical User Interfaces (GUI) and desktop applications as well as for developing games. Python is the leading choice when it comes to the financial industry. Networking apps, database applications and scripting are also fields in which python is widely used. Python is used in machine learning and Artificial Intelligence (AI) via pre-built libraries and resources.

In conclusion, python is a strong and dominant programming language in the modern day and age. Besides its few weaknesses, it has numerous strengths that overpower them greatly. The ease and efficiency of python makes it the most used and widely renowned programming language today.