How to use it. 1  Open Excel & VBA editor 2  (+) Insert the code below under Sheet1. 3  Go back to Excel and select your desired range to fill with random & non-repeating numbers.  Execute the macro (+)
See also What are the rules about using an underscore in a C++ identifier; a lot of the same rules apply to both C and C++, though the embedded double-underscore rule is in C++ only, as mentioned at the top of this answer. Names with double leading underscores are reserved for use by the implementation.
Creating the _ symbol on a U.S. keyboard. To create an underscore, hold down the Shift key and press the  -  (hyphen) key to the right of the 0 (zero) key on the top row of your keyboard. Creating the _ symbol on a smartphone or tablet.