trying to do a fibbonachi with functions with code examples

Try this out:

In the image, the "set text to Variable1" action is where you would set the variable you will be using in your game.

I do want to caution you about using really high numbers though. This program works great until you get to the 79th number in the sequence. Then the number becomes too high and, do to the nature of computers and numbers, you start to run into rounding issues. If you really do need to include the 100th number in the sequence as mentioned in your post, you are going to have to break the number into different parts (millions, thousands, hundreds, etc...).