Sunday, 5 May 2013

Java boolean Variables

These store the values true or false. There are two in the example below.

The first is called one_greater_than_two and stores the value obtained by evaluating the condition 1 > 2, which is clearly false.

The second is called two_greater_than_one and stores the value obtained by evaluating the condition 2 > 1, which is clearly true.

The tests at the end of the program check that the two booleans have been assigned the correct values:

UBUNTU > cat prog20.java
public class prog20
{
public static void main (String args[])
  {
  boolean one_greater_than_two = (1 > 2);
  boolean two_greater_than_one = (2 > 1);

  if (one_greater_than_two)
    {System.out.println ("1 > 2");}

  if (two_greater_than_one)
    {System.out.println ("2 > 1");}
  }
}
UBUNTU > javac prog20.java
UBUNTU > java prog20
2 > 1
UBUNTU >


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