# Booleans

Booleans are true or false statements. Unlike strings or numbers, booleans store statements of truth: is what I am saying true or false? For example, if I ask, “Are you a robot?", this question produces a true or false result, which we call a Boolean. In this case, since you are not a robot (hopefully!), we would produce false. We can also use math operators to create boolean expressions. Here are some examples; however, notice the unusual symbols for “equal to” and “not equal to”:

OperatorDescriptionOperatorDescription
`<`Less than`>`Greater than
`<=`Less than or equal to`>=`Greater than or equal to
`==`Equal to`!=`Not equal to

As usual, use `System.out.println` to print out your results:

``````System.out.println(10 < 8);
System.out.println((3 * 6) == (32 - 14));
``````

## Booleans Operators

You can also connect boolean expressions together using the `&&` (AND) and the `||` (OR) operator. For example, suppose I ask: “Are you a human, and is Nuvi a robot?” The word “and” connects the two true-false questions together. In this case, since it is true that you are a human, and it is also true that Nuvi is a robot, then the overall result is `true`. Here’s a chart that describes what happens when we connect booleans together:

ExpressionResultExpressionResult
`true && true``true``true || true``true`
`true && false``false``true || false``true`
`false && true``false``false || true``true`
`false && false``false``false || false``false`

To summarize, `&&` requires both Boolean expressions to be true, while `||` only requires one of the two Boolean expressions to be true. Here are some more examples:

• `(5 < 8) && (9 != 10)` produces `true` since both 5 is less than 8 and 9 is not equal to 10.
• `(6 != 2 * 3) || (8 < 2 * 4)` produces `false` since both 6 not equal to 2 * 3, and 8 not being less than 2 * 4 produce `false`.