name='''Python String
Python string is an immutable sequence of unicode characters. 
In Python, str class handles string objects, and strings are of type str.
To define a string literal, you can use single quotes, double quotes or triple quoted.'''
print(name);str1='hello world!';print(str1) #single quotes
str2="hello world!";print(str2)#double quotes
str3="""Hello world!""";print(str3) #triple quotes with double quotes
str4='''hello world!''';print(str4)#triple quotes with single quotes
#Triple quoted strings can define multiple line strings#
str1='''hello world!
hello user!
hello!''';print(str1)