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5.Python Strings

Python Strings
    Strings in Python is defined as a set of characters written within the quotation marks. We can use single quotes or double quotes to represent strings. The plus (+) sign is the string concatenation operator and the asterisk (*) is the repetition operator. 


MULTILINE:
    By using three quotation,we can print multi line strings.
Program:
a="""Welcome to
tamil hacks.Lets
get started!! and learn
python."""
print(a)
or 
a='''Welcome to 
tamil hacks.Lets
get started!! and learn
python.'''
print(a)

Output
Welcome to
tamil hacks.Lets
get started!! and learn
python.

Strings as arrays
    Strings are the arrays of bytes representing the characters.Square brackets can be used to access the characters of the string. Note that The first character starts from 0 and not from 1.
Program
a='''Welcome to
tamil hacks.Lets
get started!! and learn
python.'''
b="Python"
print(a[9])
#the 9th character in variable a is o
print(b[3]) #the 3rd character in variable b is h
Output
o
h

String slicing:
    In order to print the substring or a range of characters, string slicing is used. In slicing,the start index and end index is specified to print the characters/string within the start and end indexes. 
Program
a="Tamil Hacks"    #variable
print(a[3:10])         #3 is the start index(i)
                               #10 is the end index(k)

Output
il Hack 
Reverse slicing or negative indexing:
    Negative indexes or reverse slicing is used to start the slice from the end of the string rather than from the beginning of the string. 
Program
a="Tamil Hacks"    #variable
print(a[-10:-3])       # - indicates negative indexing
Output 
amil Ha
Visit the video link below to ace python programming!!

Happy Learning!!

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