Python String

What is String?

• String is a collection of alphabets, words or other characters. It is one of the primitive data structures and are the building blocks for data manipulation. Python has a built-in string class named str . Python strings are “immutable” which means they cannot be changed after they are created.

Create with Single quotes: 

• String1 = ‘Welcome to the Reviving India’
  print(String1)
  print(type(String1))

Double quotes:

• String1 = “Welcome to the Reviving India”
  print(String1)
  print(type(String1))

Triple quotes:

• String1 = ”’Python Tutorial”’
  String2 = “”” Hello world”””
  print(String1,String2)
  print(type(String1),type(String2))

Read or Access String

• Complete String
• Single substring
• Multiple substring

Example:

• String1 = ‘Welcome to the Reviving India’
  
• print(String1)   #Complete String
• print(String1[0]) #Ist substring
• print(String1[-1]) #Last substring
• print(String1[0:5]) #Mutiple substring

Update

• Updating of substring from a String is not allowed.
• This will cause an error because item assignment from a String is not supported

Insert

• Inserting of substring from a String is not allowed.
• This will cause an error because item assignment from a String is not supported.
• But we can achieve this through string concatenation (c = a+b)

Delete

• Deletion of entire string is possible with the use of del keyword but deletion of characters from a String is not allowed
• del <string_name>

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