else adds a second block that runs when the condition is false. Exactly one of the two blocks runs, never both, never neither:
int balance = -4;
if (balance >= 0) {
System.out.println("Balance OK");
} else {
System.out.println("Overdrawn");
}Overdrawnelse has no condition of its own: it simply catches every case the if didn't. The } else { line closes the first block and opens the second, so it lines up with the if.
Read the hour of the day (0 to 23) and print Good morning when it's before 12, and Good afternoon otherwise. For the input 9 the program prints:
Good morningRead an age and print Adult for 18 or older, otherwise Not yet an adult. For the input 18 the program prints:
How old are you?
AdultRead a number of points. With 50 or more, print Passed with N points; otherwise N points is not enough, 50 needed. For the input 72 the program prints:
Passed with 72 points