Table of Contents
The islower() method returns True if all alphabets in a string are lowercase alphabets. If the string contains at least one uppercase alphabet, it returns False.
The syntax of islower() is:
string.islower()
1. islower() parameters
The islower() method doesn’t take any parameters.
2. Return Value from islower()
The islower() method returns:
- True if all alphabets that exist in the string are lowercase alphabets.
- False if the string contains at least one uppercase alphabet.
3. Example 1: Return Value from islower()
s = 'this is good' print(s.islower()) s = 'th!s is a1so g00d' print(s.islower()) s = 'this is Not good' print(s.islower())
Output
True True False
4. Example 2: How to use islower() in a program?
s = 'this is good'
if s.islower() == True:
print('Does not contain uppercase letter.')
else:
print('Contains uppercase letter.')
s = 'this is Good'
if s.islower() == True:
print('Does not contain uppercase letter.')
else:
print('Contains uppercase letter.')
Output
Does not contain uppercase letter. Contains uppercase letter.
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