The UPPER function is to convert all letters in lower case in a text string to upper cases, and keep other characters as they are. For example, "Upper Function 1" to "UPPER FUNCTION 1".
–Text is required, the text string that you need to covert lower cases to upper cases.
– All the characters in the text string that are not letters will not be changed
Example: Change all letters "How to Use UPPER Function" to upper cases?
The result returns "HOW TO USE UPPER FUNCTION", all letters are now in upper cases.