What is nominal scale?

A nominal scale of measurement is used for variables that are not quantitative or have no numerical value. In other words, it doesn't matter what order we place them in. Consider the numbers on football players' jerseys. Is the athlete wearing the number 1 better than the player wearing the number 82? Maybe, but it has nothing to do with the numbers they wear. We may categorise pupils into classes A, B, C, D, and so on, which are also codes. There is no such thing as more than or less than in this case. Any letter number or numerical value used in a nominal scale has no quantitative meaning; they are simply employed for convenience.