- Operations on string in Python -

 String:

 A string is a list of characters. · It can be a combination of alphabets, numbers, punctuation, or can even include space. · In python, anything enclosed between “ “ or ‘ ‘ is considered a string.

In the below given beautiful phrase from “Winnie-the-pooh”

How many times the words ‘than you’ is repeated? 3 

How many words are there in this sentence? 18 

How many sub sentences are in this phrase? 4 

How many words end with ‘er’ in this phrase? 4 

This is an example of how we can manipulate a sentence. Now suppose it's an article that spans pages. Will it be easy to manipulate it manually? That’s where string manipulation functions help us. 

If ‘str’ is a string variable, · str[0] refers to first character, · str[1] refers to the second character, and so on. · Finally str[len-1] refers to the last character where ‘len’ is the length of the string. 

Some other useful and most commonly used string functions are :

Let’s check out how we can analyze the few lines of the book “Charlie and the chocolate factory” by Roald Dahl and print out a report on it.

 Print the title of the book “Charlie and the chocolate factory” and then store the few lines of the book in a variable and print it.

Note: 

use “ and “”” · For storing multi-lines

use “””. · For storing single line use “ or ‘

Let's see how Python can help us how many characters are there in the story snippet above.

No. of the lines in the paragraph ..Do you think it will be more than 5?

 Let’s find out. No. of sentences = No. of ‘. 'Isn’t it?

Print characters in word chocolate in separate lines. 

Output:

Program to Check if the word entered by the user is a palindrome. (ie reads the same from both sides .eg: madam)

Print the number of vowels in the story name.