Given two numbers a and b, build a String that contains every number from a to b, inclusive. Precondition: a < b for all inputs.

Remember that String is not a primitive data type in Java, which means that you must use the capitalized word String to refer to it.

Building a String means doing the following things:

1) Create a String object and assign it to the empty String, "".

String output = "";

2) When you have a number or numeric expression to concatenate (add to the end of) the existing String, use the + or += operators. Here are two examples:

output = output + 5; //adds the character 5 to the end
output += 5; //also adds the character 5 to the end