Mixed case letter意思

"Mixed case letter" refers to a letter that is a combination of uppercase and lowercase letters. For example, "Aa" or "Bb" are mixed case letters because they each contain one uppercase letter and one lowercase letter.

In the context of programming or data processing, mixed case letters might be used to refer to strings or text that contain both uppercase and lowercase letters, as opposed to strings that are all uppercase or all lowercase. This can be important in situations where the case of letters is significant, such as in passwords or in the names of files or directories.