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. Mar 7, 2023 · This method not only converts all uppercase letters of the Latin alphabet into lowercase ones, but also shows how such logic is implemented. You can test this code in any online Python sandbox. 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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