STRING OPERATIONS
==================
CHANGING OF A CASE OF THE STRINGS
==================================
upper()
======
	==> an inbuilt method in python,
		used to convert the total given string into upper case string.
	Syntax:
		str_data.upper()

lower()
=====
	==> an inbuilt method in python,
		used to convert the given string into lower case string.
	Syntax:
		str_data.lower()

swapcase()
========
	an inbuilt method in python,
		used to convert a lower case string to upper case
		and upper case string to lower case
	Syntax:
		str_data.swapcase()

title()
====
	Title case ==> that every word of the same string should be start with capital letter.
	ex: python programming language
	title case ==> Python Programming Language

	title() is an inbuilt method in python,
		used to convert anycase string into title case.
	Syntax:
		str_data.title()

capitalize()
========
	capitalize ==> in the entire string (might be with more than one word)
		that only the first word should start with capital
		remaining all the characters in lower case

	Ex: Python programming language

	capitalize() is an inbuilt method
		used to convert any case string into capitalize case.
	Syntax:
		str_data.capitalize()

str1 = "python"
str2 = "Python"
str3 = "PYTHON"
str4 = "PYTHON programming LanGuage"
str5 = "object orieneted programming language"
str6 = "HIGH LEVEL PROGRAMMING LANGUAGE"

# Before the case change

print(str1)
print(str2)
print(str3)
print()

# After the case change to upper case

print(str1.upper())
print(str2.upper())
print(str3.upper())
print()

# After the case change to lower case

print(str1.lower())
print(str2.lower())
print(str3.lower())
print()

# After the case change to swap case
print(str1.swapcase())
print(str2.swapcase())
print(str3.swapcase())
print(str4.swapcase())
print()

# After the case change to title case
print(str4.title())
print(str5.title())
print(str6.title())
print()

# After the case change to Capitalize case

print(str1.capitalize())
print(str2.capitalize())
print(str3.capitalize())
print(str4.capitalize())
print(str5.capitalize())
print(str6.capitalize())

================================

Note:
====
Identifiers:
	variables
	classes
	objects
	methods etc.
==> to name any entity in program, identifiers are used.
==> identifiers with different case formats
	lower case, upper case, title case, capitalize, camel case
camel case:
	Python programming language
	camel case  ==> python Programming Language 

==> In Python: the identifiers can be suggested to define with "came case" in  real world.

======================================================
String Validation:
=============

Application
	full name
	user name
	password
	mail : @gmail.com/@rediffmail.com etc.
Job Portal
	social media:
		linkedin : url
		facebook : url

endswith()
========
	==> an inbuilt method in python,
		used to check whether the given string data is ended with specified group of characters/string or not.
	Syntax:
		str_data.endswith("reference String")
	return: True/False (Boolean value)

startswith()
========
	==> an inbuilt method in python,
		used to check whether the given string is start with the specified group of characters/string or not.
	Syntax:
		str_data.startswith("Reference_String")
	return: True/False

mail = "ravivraoinfs@gmail.com"
email = "ravivraoinfs@gmaill.com"
url = "http://www.ashokit.com"

result1 = mail.endswith("@gmail.com")
result2 = email.endswith("@gmail.com")

print(result1)
print(result2)

if url.startswith("https://"):
    print("The Given URL is Secure.")
else:
    print("The Given URL is not Secure.")

========================================

CHECKING OF CHARACTERS OF THE STRINGS
=======================================
isalnum()
=======
	al ==> alphabets
	num ==> numerals
==> an inbuilt method in python
	used to check whether the given string with: alphabets and numerals only or not.
	return: true/fasle
Syntax:
	str_data.isalnum()

================================
isalpha()
=======
==> an inbuilt method
	used to check whether the given string with only alphabets or not.
return: True/False
Syntax:
	str_data.isalpha()

=======================
isdigit()
======
==> an inbuilt method
	used to check whether a string with only digits or not.
Syntax:
	str_data.isdigit()

==============================
islower()
=======
==> used to check whether the given string with only lower case or not.
Syntax:
	str_data.islower()

==========================
isupper()
=======
==> used to check whether the given string with only uppercase alphabets or not.
Syntax:
	str_data.isupper()

=================================
isspace()
======
==> return True:
	if the string with only spaces
	False:
		if the string with otherthan spaces
Syntax:
	str_data.isspace()

user_name = "Ravi1234"
un1 = "ravi"
un2 = "1234"
un3 = "ravi@1234"
cn1 = "ravikumar"
cn2 = "ravi kumar"
cn3 = "ravi1234"
pin1 = "1234"
pin2 = "abcd"
pin3 = "12ab"
pwd1 = "ravi"
pwd2 = "ravi123"
pwd3 = "RAVI"
pwd4 = "r1A2v3i4"

d1 = ""
d2 = " "
d3 = "       "
d4 = "ravi kumar"
d5 = "  ravi   "

# isalnum()

print(user_name.isalnum())
print(un1.isalnum())
print(un2.isalnum())
print(un3.isalnum())
print()

# isalpha()
print(cn1.isalpha())
print(cn2.isalpha())
print(cn3.isalpha())
print()

#isdigit()
print(pin1.isdigit())
print(pin2.isdigit())
print(pin3.isdigit())
print()

#islower()
print(pwd1.islower())
print(pwd2.islower())
print(pwd3.islower())
print(pwd4.islower())
print()

#isupper()
print(pwd1.isupper())
print(pwd2.isupper())
print(pwd3.isupper())
print(pwd4.isupper())
print()

# isspace()
print(d1.isspace())
print(d2.isspace())
print(d3.isspace())
print(d4.isspace())
print(d5.isspace())