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copied!<p>OK, my assumption is that you will enter a numeric grade 0-100, and that the letter grades you want go as "90-100: A; 80-89: B; ...; 60-69: D; 0-59: F". </p> <p>If that is not the case, your first lesson to be learned about programming is: <strong>the most important part of coding is clearly writing out specifications and requirements</strong></p> <p>Having said that, there are smart and dumb approaches.</p> <ul> <li><p>Dumb approach:</p> <ul> <li><p>Use a switch on the "input" as you do now</p></li> <li><p>Since values 90, 91... 100 are all supposed to be treated the same, put them all in as separate switch cases <strong>but only do the work in the last one</strong> (known as fall-through; <a href="http://java.sun.com/docs/books/tutorial/java/nutsandbolts/switch.html" rel="noreferrer">see SwitchDemo2 on this page for how that works</a>)</p></li> <li><p>For the last value (say, 90 if you start from 100 and go down), the switch statement would be letterGrade = "A"; break; </p></li> <li><p>once you reach case of 89, you repeat the same logic as you did for 100 through 90</p></li> <li><p>Lather, Rinse, Repeat, till 60</p></li> <li><p>Handle Fs as a default case.</p></li> </ul></li> </ul> <p>This will be very long, quite dumb (as in, brute force) and very annoying to write, and a brilliant teaching tool for why you never want to write dumb code again if you can help it.</p> <ul> <li><p>More elegant solution (<em>insert appropriate Star Wars quote here</em>)</p> <ul> <li>What do you see in common between every # that correspons to "A"?</li> </ul> <p>Right, it's the fact that, aside from 100, they all are 2-diit #s starting with 9.</p> <p>So, to handle them all in 1 case statement, wouldn't it be wonderful to switch on some value that gives you "9" for all #s between 90 and 99?</p> <p>I hope you know the answer right away... hint below...</p> <p>Yes, just divide whole by 10!</p> <p>So, you need to have a switch on your numeric grade diveded by 10, with cases of 10, 9, 8, 7, 6 and default mapping to F.</p></li> </ul> <p>Hope this covers enough ground for you to come up with working solution, while showing how the analysis might work as well.</p>

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