casefold () string in python

String casefold () method is used to implement case-insensitive string matching. It is similar to the string lower () method, but case removes all case differences present in the string. those. ignore cases when comparing. 
Syntax :

  string.casefold ()   Parameters:  the casefold doesn’t take any parameters.  return value:  it return the casefolded string the string converted to lower case. 

Examples

1. Convert string to lowercase

   # Python program to convert string to lowercase string = "GEEKSFORGEEKS"   # print lowercase string print ( "lowercase string: " , string.casefold ())

   Output:

    lowercase string: pythonengineering 

2. Check if the string is a palindrome

   # A program to check if the string # palindrome or not    # change this value for another output str = ’ pythonengineering’   # make it suitable for case insensitive comparison str = str . casefold ()   # flip the line rev_str = reversed ( str )   # check if the string is its inverse if list ( str ) = = list (rev_str): print ( "palindrome " ) else : print ( "not palindrome" )

   Output:

    not palindrome 

3. Count the vowels in a line

   # Program for counting the number of each # vowel string    # vowel string v = ’aeiou’   # change this value for a different result str = ’Hello, have you try pythonengineering?’   # user input # str = input ( & quot; Enter the string: & quot;)   # case insensitive str = str . casefold ()   # make a dictionary with each vowel key and value 0 c = {}. fromkeys (v, 0 )   # count vowels for char in str : if char in c:   c [char] + = 1 print (c)

   Output:

    {’o’: 3,’ e’: 6, ’a’: 1,’ i’: 0, ’u’: 1} 

This article courtesy of Shivani Bagel . If you are as Python.Engineering and would like to contribute, you can also write an article using contribute.python.engineering or by posting an article contribute @ python.engineering. See my article appearing on the Python.Engineering homepage and help other geeks.

Please post comments if you find anything wrong or if you’d like to share more information on the topic discussed above.