Identification

Section 1.28 Identification

These code blocks are the ones you saw in the previous question and they all doing the same thing. Among these options which one is preferable?

public static boolean isLessThan23(int number) {
   if (number >= 23) {
        return false;
   } else {
        return true;
   } 
}

public static boolean isLessThan23(int number) {
   if (!(number >= 23)) {
        return true;
   } else {
        return false;
   } 
}

public static boolean isLessThan23(int number) {
   return !(number >= 23); 
}

public static boolean isLessThan23(int number) {
   if (number < 23) {
        return true;
   } else { 
        return false;
   } 
}

public static boolean isLessThan23(int number) {
   return number < 23; 
}

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