Question

#Practical Quiz 3

#Add a comment above each line of code describing what it does.
#Be specific. Use multiple comment lines if you need to
#OR write code below the comments requesting code.
#Make sure your file runs and generates the correct results.

def main():
#define variable str1 with string "Hello"
str1 = "Hello"
#print out the 2nd letter
print(str1[1])

#START QUIZ HERE
print(str1[-2])
print(str1[:3])
print(str1[2:len(str1)-1])
str2 = "World"
print(str1+str2)

#write code below to iterate over the str1 and print each character
#separated by a space in a single line

#write code below. Create 2 lists. Print each. Print concatenation of them.

#write code that demonstrates you can append to list1 created above

#write code that demonstrates parsing of an input phrase into words in a list

#write code that gets pi from the math library and outputs as "3.14"
#using string formatting.

#in the code below, what does line[:-1] evaluate to?
#assume infile has been opened for reading
#assume infile is a text file with multiple lines each line ending with
#a carriage return/linefeed character
'''
for line in infile:
print(line[:-1])
'''
  

main()

Answer 1

def main():
    # define variable str1 with string "Hello"
    str1 = "Hello"
    # print out the 2nd letter
    print(str1[1])

    # START QUIZ HERE

    # Print out the 2nd last letter "l" of the string "Hello"
    print(str1[-2])

    # Print out the first three letters "Hel" of the string "Hello"
    # str1[:3] means letters from position 0 to 2
    print(str1[:3])

    # Print out the letters "ll" of the string "Hello"
    # Here, length of string is 5
    # str1[2:len(str1) - 1] means letters from position 2 to 3
    print(str1[2:len(str1) - 1])
    str2 = "World"

    # Print out the concatenation of str1 and str2
    print(str1 + str2)

    # write code below to iterate over the str1 and print each character
    # separated by a space in a single line
    for c in str1:
        print(c,end=" ")

    print()
    # write code below. Create 2 lists. Print each. Print concatenation of them.
    # Create 2 lists
    list1=['H','e','l','l','o']
    list2=['W','o','r','l','d']

    # Print both lists
    for e in list1:
        print(e)
    for e in list2:
        print(e)

    # Print concatenation of list
    print(list1+list2)

    # write code that demonstrates you can append to list1 created above
    list1.append('!') # This will add '!' at the end of the list
    print(list1)

    # write code that demonstrates parsing of an input phrase into words in a list
    str3="How are you"
    list3=[]
    # split function will split the string into words based on spaces
    for word in str3.split():
        list3.append(word)  # append words in list
    print(list3)

    # write code that gets pi from the math library and outputs as "3.14"
    # using string formatting.
    import math
    print("%.2f" % math.pi)

    # in the code below, what does line[:-1] evaluate to?
    # assume infile has been opened for reading
    # assume infile is a text file with multiple lines each line ending with
    # a carriage return/linefeed character
    infile = open("text.txt", "r")

    # line[:-1] prints the whole line except the last character which is the carriage return
    # So this loop will print lines without a line between each line
    for line in infile:
        print(line[:-1])

main()

SCRRENSHOT

q.py def main): # define variable stri vith string "Hello" strl "Hello" # print out the 2nd letter print (strl[l]) # START QUIZ HERE # Print out the 2nd last letter "I" of the string "Hello" print (strl [-2]) 10 # Print out the first three letters "Hel" of the string "Hello" # str1[:3] means letters from position 0 to 2 print (strl[:3]) 12 13 14 15 16 17 18 19 20 21 # Print out the letters "11" of the string "Hello" # Here, length of string is 5 # stri [2:len (str1) -1] means letters from position 2 to 3 print (strl [2:len (strl)1]) str2 = "World" # Print out the concatenation of str1 and str2 print (strl str2) 23 24 25 26 27 # write code below to iterate over the stri and print each character # separated by a space in a single line for cin strl: print(c,end) 29 30 31 32 print () # vrite code below. Create 2 lists. # Create 2 lists list1= [ 'H', 'e','1', '1',' Print each. Print concatenation of them

34 35 38 37 38 39 40 41 42 43 list2 ['W,or,l,d'] # Print both lists for e in listl: print (e) for e in list2: print (e) # Print concatenation of list print (listltlist2) # vrite code that demonstrates you can append to list! created above listi, append('!') # This will add '!' at the end of the list print (listl) 45 4 E 47 48 49 50 # write code that demonstrates parsing of an input phrase into words in a list str3 "How are you" list3 [] # split function will split the string into words based on spaces for word in str3.split): 52 53 54 list3.append(word) # append voras in list print (list3) sE 57 58 59 eo # write code that gets pi from the math library and outputs as "3.14" # using string formatting. import math print (''8.2f" % math .pl)

61 62 63 # in the code below , what does line [:-1] evaluate to? # assume infile has been opened for reading # assume infile is a text file with multiple lines each line ending with # a carriage return/linefeed character infileopen("text.txt",r) 65 67 68 69 70 # line(:-1] prints the vhole line except the last character which is the carriage return # So this loop will print lines without a line between each line for line in infile: print (line [:-1]) 72 73 main ()

OUTPUT

↑ C:\Users\mahes\AppData\Local\Programs\Python\Python36 Helloworld Hell o areyou'] 'How' 3.14 Hello hi how are you are you there am he you are there Process finished with exit code 0