String

A string is a sequence of characters. A character is simply a symbol.
Python accepts single ('), double (") and triple (""") quotes to denote string.
Strings can be created by enclosing characters inside a single quote or double quotes. Even triple quotes can be used in Python but generally used to represent multiline strings.
Objects of String are Immutable. Contents of String object cannot be changed once it is created.

String Quotes	Example
Single quotes	'Welcome to CCIT'
Double quotes	"Welcome to CCIT"
Triple quotes	'''Welcome to CCIT Amravati''' """Welcome to CCIT Amravati"""

String Methods:

Python String provides many methods that are built-in that work with string.

Case Conversion Method:

Function
s.capitalize() Capitalizes first letter of string. For ex: a="Welcome to CCIT" print(a.capitalize()) >>> Welcome to ccit
s.lower() Returns a string converted to lowercase. For ex: a="Welcome to CCIT" print(a.lower()) >>> welcome to ccit
s.upper() Returns a string converted to uppercase. For ex: a="Welcome to CCIT" print(a.upper()) >>> WELCOME TO CCIT
s.swapcase() Inverts case for all letters in string. For ex: a="Welcome to CCIT" print(a.swapcase()) >>> wELCOME TO ccit
s.title() Returns all words begin with uppercase and the rest are lowercase. For ex: a="Welcome to CCIT" print(a.title()) >>> Welcome To Ccit

Character Classification Method:

Methods in this group classify a string based on the characters it contains.

s.isalnum()

Returns true if all characters are alphanumeric and false otherwise.

For ex:

a="Welcome to CCIT"
print(a.isalnum())
>>> True

s.isalpha()

Returns true if all characters are alphabetic and false otherwise.

For ex:

a="Welcome to CCIT"
print(a.isalpha())
>>> True

s.isdigit()

Returns true if string contains only digits and false otherwise

For ex:

a="1234"
print(a.isdigit())
>>> True

s.isupper()

Returns true if all alphabets are in uppercase and false otherwise.

For ex:

a="CCIT"
print(a.isupper())
>>> True

s.islower()

Returns true if all alphabets are in lowercase and false otherwise.

For ex:

a="ccit"
print(a.islower())
>>> True

s.isspace()

Returns true if string contains only whitespace characters and false otherwise.

For ex:

a=" "
print(a.isspace())
>>> True

Character Classification Method:

Methods in this group classify a string based on the characters it contains.

s.isalnum()

Returns true if all characters are alphanumeric and false otherwise.

For ex:

a="Welcome to CCIT"
print(a.isalnum())
>>> True

s.isalpha()

Returns true if all characters are alphabetic and false otherwise.

For ex:

a="Welcome to CCIT"
print(a.isalpha())
>>> True

s.isdigit()

Returns true if string contains only digits and false otherwise

For ex:

a="1234"
print(a.isdigit())
>>> True

s.isupper()

Returns true if all alphabets are in uppercase and false otherwise.

For ex:

a="CCIT"
print(a.isupper())
>>> True

s.islower()

Returns true if all alphabets are in lowercase and false otherwise.

For ex:

a="ccit"
print(a.islower())
>>> True

s.isspace()

Returns true if string contains only whitespace characters and false otherwise.

For ex:

a=" "
print(a.isspace())
>>> True

Character Classification Method:

Methods in this group classify a string based on the characters it contains.

s.isalnum()

Returns true if all characters are alphanumeric and false otherwise.

For ex:

a="Welcome to CCIT"
print(a.isalnum())
>>> True

s.isalpha()

Returns true if all characters are alphabetic and false otherwise.

For ex:

a="Welcome to CCIT"
print(a.isalpha())
>>> True

s.isdigit()

Returns true if string contains only digits and false otherwise

For ex:

a="1234"
print(a.isdigit())
>>> True

s.isupper()

Returns true if all alphabets are in uppercase and false otherwise.

For ex:

a="CCIT"
print(a.isupper())
>>> True

s.islower()

Returns true if all alphabets are in lowercase and false otherwise.

For ex:

a="ccit"
print(a.islower())
>>> True

s.isspace()

Returns true if string contains only whitespace characters and false otherwise.

For ex:

a=" "
print(a.isspace())
>>> True

Character Classification Method:

Methods in this group classify a string based on the characters it contains.

s.isalnum()

Returns true if all characters are alphanumeric and false otherwise.

For ex:

a="Welcome to CCIT"
print(a.isalnum())
>>> True

s.isalpha()

Returns true if all characters are alphabetic and false otherwise.

For ex:

a="Welcome to CCIT"
print(a.isalpha())
>>> True

s.isdigit()

Returns true if string contains only digits and false otherwise

For ex:

a="1234"
print(a.isdigit())
>>> True

s.isupper()

Returns true if all alphabets are in uppercase and false otherwise.

For ex:

a="CCIT"
print(a.isupper())
>>> True

s.islower()

Returns true if all alphabets are in lowercase and false otherwise.

For ex:

a="ccit"
print(a.islower())
>>> True

s.isspace()

Returns true if string contains only whitespace characters and false otherwise.

For ex:

a=" "
print(a.isspace())
>>> True

#Write a program to count total no. of 'a' in a String.
Ex: s="Amravati is smart city"

  import java.util.Scanner;
  class demo
  {
    public static void main(String args[])
    {
        String s ="Amravati is smart city";
        int c = 0 ;
        for( int i=0;i<s.length();i++)
        {
            char ch = s.charAt( i );
            if(ch=='a' || ch=='A')
                c=c+1;
        }
        System.out.println("Count is "+c);
    }
  }

Count is 4

#Write a program to count total no. of vowels in a String.
Ex: s="Amravati is smart city"

  import java.util.Scanner;
  class demo
  {
    public static void main(String args[])
    {
        String s ="Amravati is smart city";
        int c=0;
        for(int i=0;i<s.length();i++)
        {
            char ch =s.charAt(i);
            if( ch=='a'||ch=='A'||ch=='e'||ch=='E'||ch=='i'||ch=='I'||ch=='o'||ch=='O'||
            ch=='u'||ch=='U' )
                c=c+1;
        }
        System.out.println("Total Vowels are "+c);
    }
  }

Total Vowels are 7

#Write a program to count total no. of words in a String.
Ex: s="Amravati is smart city"

  import java.util.Scanner;
  class demo
  {
    public static void main(String args[])
    {
        String s = "Amravati is smart city";
        int c=0;
        for(int i=0;i<s.length();i++)
        {
            char ch = s.charAt( i );
            if( ch == ' ')
                c=c+1;
        }
        System.out.println("Total Words are "+(c+1));
    }
  }

Total words are 4

#Write a program to find reverse of a String.
s=" Amravati "

  import java.util.Scanner;
  class demo
  {
    public static void main(String args[])
    {
        String s = "amravati";
        String r = "";
        for(int i=0;i<s.length();i++)
        {
            char ch=s.charAt(i);
            r = ch+r;
        }
        System.out.println("Reverse is "+r);
    }
  }

Reverse is itavarma

CCITcoder

Introduction to Python

Conditional statements

Iterative statements

Functions

OOPs

Collection

Module and Exception

DateBase

Inherintance

GUI

Introduction to Python

Conditional statements

Iterative statements

Functions

OOPs

Collection

Module and Exception

DateBase

Inherintance

GUI

String

String

String Methods:

Case Conversion Method:

Character Classification Method:

Character Classification Method:

Character Classification Method:

Character Classification Method: