How To Use Python String CaseFold() Method – Easy Python Code Examples

In this tutorial, we’ll learn what Python string casefold() method is and how to properly use it with the help of an easy Python code examples.

Introduction: Python String casefold() Method

This method is used to return a new string having all the characters converted to lowercase format.

Syntax of casefold() Method

string.casefold()

• This method does not take any arguments.
• Python string casefold() method returns a lowercased new string.

Example 1: casefold() applied on a Python String

statement='ThIs COlor IS BluE'
print(statement.casefold())

Output

this color is blue

As you can see here, all the characters of a string are converted to lowercase.

Example 2: casefold() is a Powerful Method

statement='THIS COLOR Is BluEß'
print(statement.casefold())
print(statement.lower())

Output

this color is bluess  // using casefold() method
this color is blueß   // using lower() method

Python string casefold() method is more powerful than lower() method. We have used a German letter ß in our string which is already lowercased but Python string casefold() method will convert it to its equivalent character ss as seen in the above code output. Using lower() method on it won’t have any effect on that German character as its already lowercased.

Example 3: casefold() Method Return Value

originalValue='I AM A PAKISTANI'
returnedString=originalValue.casefold()
print(returnedString)
print(originalValue)

Output

i am a pakistani   // new string
I AM A PAKISTANI   // original string