Page 373 - Computer Science V2.0 Class 11

11. Identify the errors (if any) in the given code:
message1 = "Good'
message2 = "Night"
num = 5
print(message1 + message2)
print(message1 * message2)
print(message1 + num)
print(message2 * num)
Ans. message1 = "Goodꞌ —> double quotes on both sides of string
message2 = "Night"
num=5
print(message1 + message2)
print(message1 * message2) —> two strings cannot be multiplied
print(message1 + num) —> A string cannot be concatenated with a number
print(message2 * num)
12. Write a function in Python that returns a string, replacing every alphabetic character at even index (index 0, 2, 4, etc.) with
the corresponding uppercase letter. For example, if the string is "Welcome all," the output will be "WeLcOmE AlL".
Ans. def alter(txt):
'''
Objective: .
Input Parameter:a string
Return Value: a string that replaces alphabetic characters at even indices with
corresponding uppercase letters.
'''
length = len(txt)
finalTxt = ""
for i in range(0, length):
if i%2 == 0:
finalTxt += txt[i].upper()
else:
finalTxt += txt[i]

#if i<(length-1):
# finalTxt += txt[i+1].upper()
return finalTxt

""" To use function alter()"""
myString = input("Enter a string: ")
print("Original string: ", myString)
print("String after replacing alphabetic characters at even indices by corresponding
uppercase letters: ", alter(myString))
13. What will be the result of running the following Python code?

def mixUp(name):
for x in name:
if x.isalpha():
print("alphabet")
elif x.isdigit():
print("digit")

Strings 359