Web Reference: May 3, 2025 · Python provides several built-in string methods to work with the case of characters. Among them, isupper(), islower(), upper() and lower() are commonly used for checking or converting character cases. The other ways of handling strings is to check whether the string is in lowercase using islower () function , whether the string is in uppercase or title case using isupper () and istitle () function. Now, let’s explore the .isalpha(), .isdigit(), .islower(), and .isupper() methods with some examples. Run the following code to see how these methods check string properties.
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