Random number exclusion

This is a real beginner's question, I think...

How do I exclude a number from being randomly generated? Essentially, I want to save the last number generated as a variable then exclude it from the next pick so the same number is never picked twice in a row.

You can make a global variable called "Last_generated_number" and each time you generate a number you store it here.

Then you can do a check:

While

random(number) = Last_generated_number

Then as long the random(number) = Last_generated_number it will make a new roll.

Then when its not Equal to the "last_generated_number" it will continue and you can use it. Then you store the new number in the "last_generated_number" variable, so it will be used for the check next time.

If you dont used negative numbers. You can just put "Last_generated_number" to -1 as default from the beginning, so it will never match the first generated number.

I have made this with an array and choose.

Array: 0:"0", 1:"1", 2:"2"

than choose on the indexes and delete the picked one.

Thank you both! That's exactly what I needed to know.