String Exercises

1.    1.      Write a program to input a sentence. Find and display the following:

(i) Number of words present in the sentence
(ii) Number of letters present in the sentence
Assume that the sentence has neither include any digit nor a special character.

Solution:

st=input("Enter a sentance :")

words=st.split()

c=0

print("No of words :", len(words))

for i in range(len(st)):

    if st[i].isalpha():

        c=c+1

print("No. of letters :",c)

2.      Write a program in Python to accept a word/a String and display the new string after removing all the vowels present in it.
Sample Input: COMPUTER APPLICATIONS
Sample Output: CMPTR PPLCTNS

st=input("Enter a sentance :")

st1=''

for i in range(len(st)):

    if st[i] not in 'AEIOU':

        st1=st1+st[i]

    elif st[i].isspace():

        st1=st+' '

print("No. of letters :",st1)

3.      Write a program in Python to accept a name(Containing three words) and display only the initials (i.e., first letter of each word).
Sample Input: LAL KRISHNA ADVANI
Sample Output: L K A

st=input("Enter a sentance :").upper()

print("Original String :",st)

words=st.split()

st=''

for word in words:

    st=st+word[0]+" "

print("Now string :",st)

4.      Write a program in Python to accept a name containing three words and display the surname first, followed by the first and middle names.
Sample Input: MOHANDAS KARAMCHAND GANDHI
Sample Output: GANDHI MOHANDAS KARAMCHAND

st=input("Enter a String :")

words=st.split()

L=len(words)

c=st.count(' ')

print(c)

st1=''

surname=words[-1]

for i in range(L-1):

    st1=st1+words[i]+" "

print(surname+" "+st1)

5.      Write a program in Python to enter a String/Sentence and display the longest word and the length of the longest word present in the String.
Sample Input: “TATA FOOTBALL ACADEMY WILL PLAY AGAINST MOHAN BAGAN”
Sample Output: The longest word: FOOTBALL: The length of the word: 8

Solution:

st=input("Enter string :")

words=st.split()

mx=0

for word in words:

    if mx<len(word):

        st1=word

        mx=len(word)

print("The longest word: ",st1)

print("The length of the word: ",mx)

6.      Write a program in Python to accept a word and display the ASCII code of each character of the word.
Sample Input: PYTHON
Sample Output:
ASCII of  P  =  80

ASCII of  Y  =  89

ASCII of  T  =  84

ASCII of  H  =  72

ASCII of  O  =  79

ASCII of  N  =  78

Solution::

st=input("Enter string :")

for i in st:

    print("ASCII of ",i," = ", ord(i))

7.      Write a program in Python to accept a String in upper case and replace all the vowels present in the String with Asterisk (*) sign.
Sample Input: "TATA STEEL IS IN JAMSHEDPUR"
Sample output: T*T* ST**L *S *N J*MSH*DP*R

st=input("Enter string ").upper()

st1=''

for i in st:

    if i in 'AEIOU':

        st1=st1+'*'

    else:

        st1=st1+i

print(st1)

8.      Write a program in Python to enter a sentence. Frame a word by joining all the first characters of each word of the sentence. Display the word.
Sample Input: Vital Information Resource Under Seize
Sample Output: VIRUS

st=input("Enter a sentance :").upper()

print("Original String :",st)

words=st.split()

st=''

for word in words:

    st=st+word[0]+""

print("Now string :",st)

9.      Write a program in Python to enter a sentence. Display the words which are only palindrome.
Sample Input: MOM AND DAD ARE NOT AT HOME
Sample Output: MOM
                          DAD

st=input("Enter a string :")

words=st.split()

print(words)

for word in words:

    if word==word[::-1]:

        print(word)

10.  Write a program to accept a sentence. Display the sentence in reversing order of its word.
Sample Input: Computer is Fun
Sample Output: Fun is Computer

st=input("Enter a string :")

words=st.split()[::-1]

#print(words)

st1=''

for word in range(len(words)):

    st1=st1+words[word]+' '

print(st1)       

11.  Write a program to input a sentence and display the word of the sentence that contains maximum number of vowels.
Sample Input: HAPPY NEW YEAR
Sample Output: The word with maximum number of vowels: YEAR

Solution::

st=input("Enter a string ").upper()

print("Original String :",st)

words=st.split()

L=len(words)

mx,st1=0,''

for word in words:

    C=0

    for letter in word:

        if letter in 'AEIOU':

            C=C+1

    if mx<C:

        mx=C

        st1=word

print(“The word with maximum number of vowels: ”,st1)

12.  Consider the sentence as given below:
Blue bottle is in Blue bag lying on Blue carpet
Write a program to assign the given sentence to a string variable. Replace the word Blue with Red at all its occurrence. Display the new string as shown below:
Red bottle is in Red bag lying on Red carpet

Solution::

st="Blue bottle is in Blue bag lying on Blue carpet"

print(st.replace('Blue','Red'))

#Winout replace() function

st="Blue bottle is in Blue bag lying on Blue carpet"

words=st.split()

st1=''

for i in words:

    if i=='Blue':

        st1=st1+'Red'+' '

    else:

        st1=st1+i+' '

print(st1)

13.  Write a program to accept a word and convert it into lower case, if it is in upper case. Display the new word by replacing only the vowels with the letter following it.
Sample Input: computer
Sample Output: cpmpvtfr

Solution::

st=input("Enter a sentance :")

st1=''

for i in st:

    if i in 'AEIOUaeiou':

        st1=st1+chr(ord(i)+1)

    else:

        st1=st1+i

print("No. of letters :",st1)

14.  Write a program to input a sentence. Create a new sentence by replacing each consonant with the previous letter. If the previous letter is a vowel then replace it with the next letter (i.e., if the letter is B then replace it with C as the previous letter of B is A). Other characters must remain the same. Display the new sentence.
Sample Input     : ICC WORLD CUP
Sample Output  : IBB VOQKC BUQ

Solution::

st=input("Enter a string :").upper()

word=st.split()

st1=''

for i in st:

    if i.isspace():

        st1=st1+" "

    elif i not in 'AEIOU' :

        st1=st1+chr(ord(i)-1)

    else:

        st1=st1+i

st1=st1[:len(st1)-1]+chr(ord(st1[len(st1)-1])+2)

print(st1)

       

 

    15. Write a python program to reverse words in a given String Python

Sample Input : Narain Ji Srivastava

                 Output : Srivastava Ji Narain

sentance= "Narain Ji Srivastava"

s = sentance.split()[::-1] # reversing words in a given string

lst = []

for i in s:

            lst.append(i) # appending reversed words to l

# printing reverse words

print(" ".join(lst))

2.      16. Write a Python program input String and remove character from string.

str1=input("Input String :")

remove=input("Input letter which you want to remove letter(s)")

nos=int(input("Press 1-removes all occurrences\n\t2- removes first occurrences:"))

if nos==1:

    newStr=str1.replace(remove,'')

if nos==2:

    newStr=str1.replace(remove,'',1)

print(newStr)

3.      17. Write a Python program to capitalize the first and last character of each word in a string

st =input("Enter a string :")

print("Original string :", st)

a = st.split()

res = []

for i in a:

            x = i[0].upper()+i[1:-1]+i[-1].upper()

            res.append(x)

res = " ".join(res)

print("String after:", res)

18. Write a menu driven program to display the pattern of a String entered by the user. If the user enters choice ‘F’ then it displays the first character of each word. In case the choice is 'L' then it will display the last character of each word.

Sample Input: HONESTY IS THE BEST POLICY

Enter your choice: F Sample Output: H                             T                             B                             P

Enter your choice: L Sample Output: Y                             S                             E                            T                            Y

 st=input("Enter a string : ")

words=st.split()

ch=input("Enter choice Press \n'F' for display the first character of each word\n\

'L' for display the last character of each word: ").upper()

if ch=='F':

    for word in words:

        print(word[0])

if ch=='L':

    for word in words:

        print(word[-1])