ong>Answer:

1. Write a program that PERFORMS the FOLLOWING operations on a string:

(a) Prompt the user to input a string.

(b) Extract all the digits from the string.

(c) If there are digits in the inputted string:

• Calculate and display the sum of digit.

• Also display:

▪ The original string

▪ The digits

▪ The sum of the digits

(d) If there are no digits:

• Display the original string along with an appropriate message as “No Digits are present”

Ans. str1 = input("ENTER the string: ")

sum = 0

num = 0

if str1.isalpha() == False:

for i in str1:

if i.isdigit() == True:

num =num*10 + int(i)

sum += int(i)

print("Original String: ",str1)

print("Digits: ",num)

print("Sum of digits is: ",sum)

else:

print("Original String: ", str1, "has no digit")

2. Write a program with a user-defined function with string as a parameter which replaces all vowels in the

string with ‘*’.

Ans. #Function to replace all vowels in the string with '*'

def replaceVowel(ST):

#Create an empty string

newstr = ''

for character in st:

#Check if next character is a vowel

if character in 'aeiouAEIOU':

#Replace vowel with *

newstr += '*'

else:

newstr += character

return newstr

#End of function

st = input("Enter a String: ")

st1 = replaceVowel(st)

print("The original String is:", st)

Computer Science with Python–XII 3.8 1. Write a user-defined function to calculate the area of a triangle.

print("The MODIFIED String is:", st1)

Explanation:

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