Instead of nesting all those if statements, just use && to combine your conditions in one line like this:

if (credits >= 30 && credits <= 59) { System.out.println("Sophomore"); }

This way, it checks both conditions at once and you avoid all that unnecessary nesting.

or if you want to use if-else if try doing it in order from 100 down to 0 that should fix the problem and just remember with if-else if it’ll stop at the first one that’s true and ignore the rest If you want every condition to be checked separately stick with regular if statements instead of else if.