Logical Expressions

Logical expressions combine two or more expressions/conditions and evaluate to a bool value (Either true or false) based on the specific operator used.

The NOT operator (!) is also a logical operator, even though unlike the other operators it can be only used on a single expression, and can be used to invert the result of a logical expression.

Syntax

For the logical AND and OR:

EXP ( && | || ) EXP

For the logical NOT:

!VALUE;

Examples

Logical AND

// Logical AND - All must be true
true && true; // -> true
false && true; // -> false
true && false; // -> false
false && false; // -> false

Logical OR

// Logical OR - One must be true
true || true; // -> true
false || true; // -> true
true || false; // -> true
false || false; // -> false

Logical NOT

// Logical NOT - Negate
!false; // -> true
!true; // -> false

Chained Logical Expressions

Logical Expressions may be also chained together as long as you want. For example:

// Chained Logical AND - All must be true
true && true && true; // -> true
true && false && true; // -> false

// Chained Logical OR - One must be true
true || true || true; // -> true
true || false || true; // -> true
false || false || false; // -> false

Logical Expressions & Relational Expressions

You can also combine relational expressions with logical expressions, like this for example:

// ✓ Combined relational and logical expressions
(3 == 4 && 3 != 4) || (2 != 22 && 3 == 3);

// Following the order of precedence:
// -> (false && true) || (true && true)
// -> (false) || (true)
// -> true