Question

python

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"<center> <h1>CpE 4040 Midterm-2 Exam</h1> </center>"
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"1- Write a Python code which asks two numbers from the user, calculates the sum and print the result. Create a function to calculate the summation and return the result value.<br>\n",
"i.e. <br>\n",
"First Number:12 <br>\n",
"Second Number:23 <br>\n",
"12 + 23 = 35"
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"2- Create 20 random integers in an array which has the numbers between 10 and 100 (includes 10 and 100). Sort and print the numbers in descending order."
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"3- Write a Python code that asks a string from the user and prints only the lower case letters in that string."
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"4- Create an evenly spaced 21-element array between 2.2 and 12.4. Find the median of the array. Print both the array and median value. "
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"5- Write a simple number guessing game Python program. In this code, generate a random integer between 1-10 (both included) and ask the user to guess the number in three attempts. \n",
"Print appropriate responses to the user such as \"You won!\" or \"You failed\" "
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"6- Generate an array of numbers from 1 to 15. Reshape it to make 3x5 matrix. Convert the matrix into data frame and print the even number of columns. "
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Answer 1

1).

Code Screenshot:

Code:

#function received num1 and num2
def summation(num1,num2):
    #adds num1, num2 and store in value variable
    value= num1+num2
    #return value
    return value

#take input from user, convert it to int and store in num1
num1=int(input("First Number: "))
#take input from user, convert it to int and store in num2
num2=int(input("Second Number: "))
#call summation function, pass num1,num2 and store the returned value un result
result=summation(num1,num2)
#display to user
print(num1,"+",num2,"=",result)

Output:

2).

Code Screenshot:

Code:

#import random for generating random number
import random
#declare array
randomArray=[]

#run for loop 20 times(from 0 to 19)
for i in range(20):
    #generate random number using randint and append it to randomArray
    randomArray.append(random.randint(10,100))

#sort randomArray in reverse order i.e. descending order
randomArray.sort(reverse=True)

#print all the elements of randomArray
for i in randomArray:
    print(i)

Output:

3).

Code Screenshot:

Code:

#take input from user
text=input("Enter string: ")
#declare a variable
loweredString=""

#traverse all the letters in text
for i in text:
    #if the letter is in lower case
    if(i.islower()):
        #add the i letter to variable loweredString
        loweredString+=i

#display the lower case letters
print("Lowered case letters are: "+loweredString)

Output:

4).

Code Screenshot:

Code:

#import numpy module as np
import numpy as np

#create array numbers using np.linspace whose element value
#will start at 2.2, end at 12.4 and will contain 21 element
numbers=np.linspace(2.2,12.4,21)

#find median of array numbers using np.median and store in numbersMedian
numbersMedian=np.median(numbers)

#display array and median value
print("Array:" )
print(numbers)
print("Median:",numbersMedian)

Output:

5).

Code Screenshot:

Code:

#import random for generating random numbers
import random

#generate random number between 1 and 10 and store in number
number=random.randint(1,10)

#variable for checking whether the user guessed correct number
success=False

#variable for no of tries
trial=0

#run while loop till user have not made 3 guesses
while(trial!=3):
    #take input from user
    guessedNumber=int(input("Guess a number between 1-10: "))

    #if the number guessed by user is not same as the number generated
    if(guessedNumber!=number):
        #increment trial value
        trial+=1
    #else
    else:
        #set success to True
        success=True
        #move out of while loop
        break

#when user guessed the correct number
if(success==True):
    print("You guessed the correct number",number)
    print("You won!!!")
#when user did not guess the correct number
else:
    print("The correct number is ",number)
    print("You Failed!!!")
  

Output:

Sample1:

Sample 2:

6).

Code Screenshot:

Code:

#import numpy and panda
import numpy as np
import pandas as pd

#create an empyt list
numbers=[]

#from 0 to 14
for i in range(15):
    #append i to numbers after adding 1
    numbers.append(i+1)

#reshape the list to a matix of colims 5
matrix=np.reshape(numbers,(-1,5))

#convert the matrix to data frame
matrix=pd.DataFrame(matrix)

#for the columns in matrix
for col in matrix:
    #if it is a even columns
    if(col%2==0):
        #display the column
        print (matrix[col])

Screenshot: