function convertCase(lowercaseString, uppercaseString) {
var convertedLower = "";
var convertedUpper = "";
var lowercaseCharCodeDiff = "a".charCodeAt(0) - "A".charCodeAt(0);
for (var i = 0; i < lowercaseString.length; i++) {
var char = lowercaseString[i];
var charCode = char.charCodeAt(0);
if (charCode >= 97 && charCode <= 122) {
// Convert lowercase to uppercase
char = String.fromCharCode(charCode - lowercaseCharCodeDiff);
}
convertedLower += char;
}
var uppercaseCharCodeDiff = "A".charCodeAt(0) - "a".charCodeAt(0);
for (var j = 0; j < uppercaseString.length; j++) {
var char = uppercaseString[j];
var charCode = char.charCodeAt(0);
if (charCode >= 65 && charCode <= 90) {
// Convert uppercase to lowercase
char = String.fromCharCode(charCode + uppercaseCharCodeDiff);
}
convertedUpper += char;
}
return [convertedLower, convertedUpper];
}
var lower = "hello";
var upper = "WORLD";
var result = convertCase(lower, upper);
console.log("Converted Lowercase: " + result[0]); // Output: "HELLO"
console.log("Converted Uppercase: " + result[1]); // Output: "world"