String data type:

1. Any sequence of charcaters we can call it as string

2. We can mention this data type in "Single quote / Double quotes / Trple quotes"

3. here we can use triple quotes when we are writing Multy line literals

example:

name = "Raja

gopal

Naidu"

print(name) #Error

Name = '''Raja

gopal

Naidu''' #Success

How to access characters in the string:

1. By using Indexing

2. By using Slice operater

s = 'raja'

print(s[2])

print(s[-2])

print(len(s))

Ex: Write a program to read string from the key board and display

its characters by index wise (both positive and negative index wise)

##Positive index

s = 'raja'

i=0

for x in s:

print('The chracter of positive index {} is {}' .format(i,x))

i=i+1

## Negative index

s = 'raja'

i=-1

for x in s:

print('The chracter of positive index {} is {}' .format(i,x))

i=i-1

## or if we need both indexes in one line

s = 'raja'

i=0

for x in s:

print('The chracter of positive index {} and negative index {} is {}' .format(i,i-len(s),x))

i=i+1

##another example:

s = 'DEVARA'

i=0

for x in s:

print('The chracter of positive index {} and negative index {} is {}' .format(i,i-len(s),x))

i=i+1

s = "RAMAMMM RAGAVAM"

i=0

for x in s:

print("Positive index is {} Negative index is {} letter is{}" .format(i,i-len(s),x))

i=i+1

s = "RAMAMMM RAGAVAM"

i=0

for x in s:

print(x)

i=i+1

print(i)

#### Indexing by using Slice operater:

Slice operater syntax = [Begain value : End value : Step value]

slice operater won't rise index error

string = "0123456789012345"

print(string[2:100])

print(string[3:7])

Slice [Begin value : End value : Step value ]

All atributes are optional in slicing

All values can be either +ve or -ValueError

if step value is +ve then forword direction from Beagin to End-1

if step value is -ve then Backward direction from End to Beagin +1

In forward direction if End value is "0" the result is always Emply string

In the Backward direction if the end value is -1 then result is always Empty string