Python String Operations and Methods

String

A string is a sequence of characters enclosed in quotation. We can use single (‘‘), double(“ “) or triple(‘ ‘ ‘ ‘ ‘ ‘ ) quotes to define a string in python.

The characters present in a string can be any digit, letter, symbols or space. String in python is an immutable data type i.e once a value is assigned it cannot be changed later.

Syntax : stringname= ” abcd1234@#$%^ “

Example:

String Operations

· Concatenation

· Replication

· Indexing

· Slicing

Concatenation

Concatenation is the operation of joining two or more strings together.

Python strings can be joined using the concatenation operator (+).

Syntax: str= str1 + str2

Example:

Replication

Python allows us to repeat a string multiple times with the help of (*) operator.

Syntax: stringname * integer

Example:

Indexing

Indexing allows us to access individual characters in a string by using a numeric value.

Example:

Slicing

Slicing is about obtaining a sub-string from the given string by slicing it.

Syntax: string[start : end : step]

Note:

· Start is inclusive

· End is Exclusive

· Step is increment between each index for slicing. (Optional)

Example:

String Methods

Python has some built-in methods that you can use on strings.

Some of them are listed below:

· lower() : converts a string into lower case.

· upper() : converts a string into upper case.

· title() : converts the first letter of each word to upper case.

· capitalize() : converts the first character to upper case.

· swapcase() : converts lower case to upper case and vice versa.

· find() : finds the string for a specified value and return the position.

· count() : returns the number of occurance of a specified value in a string.

· replace() : It is used to replace a value with another specified value.

· format() : formats the specified value and inserts them inside the string’s placeholder.

Output:

· split() : splits/breaks the string at a specified point and returns a list.

· lstrip() : returns a left trim version of a string.

· rstrip() : returns a right trim version of a string.

· strip() : removes spaces at the beginning and at the end of the string.

· center() : returns a centered string.

· startswith() : it is used to check, if the string starts with a specified value.

· endswith() : it is used to check, if the string ends with a specified value.

End Notes

In this article, we have covered python string operations and methods that will help you understand python better.