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What is String ?�

A string is a sequence of characters used to represent text in programming. It can include letters, numbers, symbols, and spaces. which is enclosed by single, double and triple quotes (‘ ‘, “ “, ‘’’ ‘’’)
For example, "Hello" and "123"

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Introducing CRUD Operation

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How to Create String?

We can declare passing n number of characters within single quotes or double quotes .
For ex : x = “Reviving India”

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Ways to Read Data from string

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Indexing in Python

It refers to the position of an element in a string . It can be positive indexing & negative indexing.
Positive Index start with 0 ,1,2 .. and so on and 0 denote the first element
Negative Index start with -1,-2,-3 and so on and -1 denote the last element

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Slicing in Python

It used to access multiple elements from the string.
Syntax : [start : stop : step]

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How to Update String

Strings are immutable in Python, so you can't change a string directly.
Instead, create a new string with the desired changes.

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How to Delete String?

We can’t delete any chracters from the string since the string is a immutable datatype.
But we can delete entire data from the variable.

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String Methods

To manipulate strings , use builtin string methods..

All string methods returns new values. They do not change the original string.

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capitalize()

string.capitalize()

The capitalize() method returns a string where the first character is upper case.

No parameters�

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Casefold()

The casefold() method returns a string where all the characters are lower case.

string.casefold()

No parameters

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count

The count() method returns the number of times a specified value appears in the string.
string.count(value, start, end)

value	Required. A String. The string to value to search for
start	Optional. An Integer. The position to start the search. Default is 0
end	Optional. An Integer. The position to end the search. Default is the end of the string

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find

The find() method finds the first occurrence of the specified value.
The find() method returns -1 if the value is not found.

string.find(value, start, end)

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index

The index() method finds the first occurrence of the specified value.

the only difference is that the index() method raises an exception if the value is not found.

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join

The join() method takes all items in an iterable and joins them into one string.

string.join(iterable)

iterable	Required. Any iterable object where all the returned values are strings

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lower

The lower() method returns a string where all characters are lower case.

string.lower()

No parameters

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replace

The replace() method replaces a specified phrase with another specified phrase. (All Occurrence)

string.replace(oldvalue, newvalue, count)

oldvalue	Required. The string to search for
newvalue	Required. The string to replace the old value with
count	Optional. A number specifying how many occurrences of the old value you want to replace. Default is all occurrences

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split

The split() method splits a string into a list.

You can specify the separator, default separator is any whitespace.

string.split(separator, maxsplit)

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swapcase

The swapcase() method returns a string where all upper case letters are lower case and vice versa.

string.swapcase()

No parameters.

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title

The title() method returns a string where the first character in every word is upper case.

string.title()

No parameters.

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upper

The upper() method returns a string where all characters are in upper case.

string.upper()

No parameters

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len

returns the length of the string.

len( str )

No Parameters.