Python islower() is one of the Python String Method returns True if all string characters are in lowercase. It returns False if not in lowercase.
1 | The syntax of the method is: str.islower() |
Key Points :
• There are no parameters for the islower() method.
• If a string is all letters in the lowercase, this method returns true and false otherwise.
• If all other characters in the specified string are alphabet and lowercase, this returns true for whitespace. This method returns false for a string of only whitespaces.
• This approach returns false for digits and symbols.
We’ll be covering the following topics in this tutorial:
Return Value from islower()
The islower() method returns:
• True if all characters in the string are alphabets in a lower case.
• False if at least one uppercase alphabet is included in the string.
Below is the python program to demonstrate the islower() function:
1 2 3 4 | str = "The Best Learning Resource for Online Education";print (str.islower())str = "the best learning resource for online education";print (str.islower()) |
When we run above the program, the outcome is as follows:
False
True
How to use islower() in a program?
1 2 3 4 5 6 7 8 9 10 | str = 'the best learning resource for online education'if str.islower() == True: print('Does not contain uppercase letter.')else: print('Contains uppercase letter.')str = 'The Best Learning Resource For Online Education'if str.islower() == True: print('Does not contain uppercase letter.')else: print('Contains uppercase letter.') |
When we run above the program, the outcome is as follows:
Does not contain uppercase letter.
Contains uppercase letter.
Below are several other functions that we can use to work with string in Python 3
Dinesh Thakur holds an B.C.A, MCDBA, MCSD certifications. Dinesh authors the hugely popular