Strings in Python

Strings are the sequence of characters . We can use single or double quote to represent a string:

If your string contains single quote as mentioned above, then wrap the string in double quotes, because

‘I’m playing cricket’ — will result in error

To escape from this error, we can use escape character also:

‘I\’m playing cricket’

We can use indexing and slicing to grab the sub-sections of a string. Indexing uses the [] notation after the string. You can access single character from a string.

e.g. let’s consider a string, “india”

so, index of i is 0, index of n is 1 and same index of a is 5. In short, indexing for “india” is like 0 1 2 3 4 .

Reverse indexing for string “INDIA” is -5 -4 -3 -2 -1

length of string is calculated using len() function. len() function treats white spaces as a character.

Slicing allows you to access multiple characters of a string. Syntax for slicing a string is :

[start:stop:step]

start: numerical index for slice start

stop: index you will go upto

step: size of “jump” you take

e.g. Slicing will start from index from 0 to 7 and jumping by 2 positions.

let’s see more examples:

Reverse of a string can be done as below:

Immutability of a string:

Strings are immutable. It means you cannot change the content of a string.

You can change the content of string by means of concatenation.

Let’s say I want to change P in ‘Python’ to A to make it ‘Aython’.

Let’s explore more:

String Formatting:

There are two methods for formatting:

.format() method had taken string ‘ankit’ and kept in the place of curly braces.

2. f-strings (formatted string literals) (Python 3.6 update)

Differences in printing in Python 2 and Python 3:

Python 2:

Python 3:

In Python 3, print is a function, not a statement.

Happy Coding!

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