Conditionals and Loops - Java Software Solutions: Foundations of Program Design - page 214

condition
evaluated

true false

statement

FIGURE 5.6 The logic of an if statement

is part of the if statement; it implies that the if statement governs whether the
assignment statement will be executed. Although this indentation is extremely
important for the human reader, it is ignored by the compiler.
The example in Listing 5.1 reads the age of the user and then makes a decision
as to whether to print a particular sentence based on the age that is entered.The
Age program echoes the age value that is entered in all cases. If the age is less than the
value of the constant MINOR , the statement about youth is printed. If the age is equal
to or greater than the value of MINOR , the println statement is skipped. In either case,
the final sentence about age being a state of mind is printed.

LISTING 5.1

//********************************************************************
// Age.java Author: Lewis/Loftus
//
// Demonstrates the use of an if statement.
//********************************************************************

import java.util.Scanner;

public class Age
{
//-----------------------------------------------------------------
// Reads the user's age and prints comments accordingly.
//-----------------------------------------------------------------
public static void main (String[] args)
{
final int MINOR = 21;

Scanner scan = new Scanner (System.in);