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There are methods in the String class; toUppercase() and toLowerCase().

i.e.

String input = "Hello!";

String upper = input.toUpperCase(); //stores "HELLO!"

String lower = input.toLowerCase(); //stores "hello!"

-Note: these methods are NOT modifier methods therefore the original string is still "Hello!"

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Q: Java program convert the inputed words into its upper case or lower case form?
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