Logical Operators
Logical operators normally take relational expressions as operands. The ! operator takes one operand. The rest take two: one to the left, and one to the right.
| && | AND |
| || | OR |
| ! | NOT |
Logical Expressions
| expression1 && expression2 is true if, and only if, both expressions are true. |
| expression1 || expression2 is true if either one or both expressions are true. |
| !expression is true if the expression is false, and vice versa. |
Order of Evaluation for Logical Expressions
Logical expressions are evaluated from left to right. Evaluation stops as soon as something is discovered that renders the expression false.
Examples
| 6 > 2 && 3 == 3 is true. |
| ! ( 6 > 2 && 3 == 3 ) is false. |
| x != 0 && 20/x < 5 The second expression is evaluated only if ... |
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