“areaCode + “”-“” + exchange + “”-“” + lastFour”,”Given three int variables that have been declared and given values , areaCode, exchange, and lastFour, write a String expression whose value is the String equivalent of each these variables joined by a single hyphen (-) So if areaCode, exchange, and lastFour, had the values 800, 555, and 1212, the expression ‘s value would be “”800-555-1212″”. Alternatively, if areaCode, exchange, and lastFour, had the values 212
867 and 5309 the expression ‘s value would be “”212-867-5309″”.”