```if ( fiber >= 4 || foam >= 3 )
System.out.println("House passes the code requirements!" );
else
System.out.println("House fails." );
```

Here is what would happen if a house had 6 inches of fiberglass batting and 0 inches of plastic foam:

```fiber >= 4 || foam >= 3
---------    ---------
true          false
---------------
true
```

One true is enough.

# Difference between AND and OR

A B A && B A || B
F F F F
F T F T
T F F T
T T T T

AND is different from OR. Both of them combine Boolean values ( true/false values ) into one Boolean value. But each does this in a different way:

• All the values AND combines must be true to get a true.
• At least one of the values OR combines must be true to get a true.

The operation of AND and OR can be displayed in a truth table. In the table, A and B are operands. They stand for true/false values or expressions that yield true/false values. For example, A could stand for a relational expression such as `memory > 512` or a string comparison like `phrase.equals( "quit" )`.

Each row of the truth table shows how logical operators combine the true/false values of operands. For example, row one says that if A is false and B is false, then A && B is false also A || B is false.

Row three says that if A is true and B is false, then A && B is false also A || B is true.

All possible truth values of the operands A and B are listed in the left two columns. Each operand can take the value true or the value false, so there are four possible combinations of values for the two operands.

### QUESTION 21:

Pick true or false for each of the following:

 ` 5 > 2 || 12 <= 7 ` ` 5 > 2 && 12 <= 7 ` ` 3 == 8 || 6 != 6 ` ` 3 == 8 && 6 != 6 `

(Remember that `!=` means "not equal.")