You can convert your text into deferments cases such as upper case, lower case and proper case if you use text function which is available in excel.


Text Function Upper Case 

In Excel, the UPPER function is used to convert all the characters in a text string to uppercase. This function is useful when you need to standardize the formatting of your text data.

Syntax
=UPPER(text)

Arguments
text - text string that you want to convert to uppercase.


After It you will see something like this all text is converted in Upper case.