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. Jan 14, 2025 · In this case, it doesn't matter whether we're uppercasing or lowercasing our strings. We just need to perform the same operation on both strings before we compare them. First, let's review the basic usage. This example uses the upper()method to convert all characters to uppercase, but the other methods work similarly. In Python, string objects (str) are immutable; thus, the original string remains unmodified. If you want to use the converted string later, you can assign it to a new variable like this: You can also...
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