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. Learn more about strings in our Python Strings Tutorial. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more. Upper case is defined as the letters that are written or printed in their large forms or also known as capital letters. Note: Numbers, symbols and spaces in the given string are not checked, only the alphabet characters are considered. This method does not accept any parameter.
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