# Cpp - Operator Logical Operators

## Introduction

To test more than one condition, use the logical operators && (also called AND) and || (OR).

Operator
Symbol
Example
AND
&&
OR
||
NOT
!

## AND Operator

The logical AND operator evaluates two expressions. If both expressions are true, the logical AND expression is true. Consider this statement:

```if ((x == 5) && (y == 5)) {
// do something here
}
```

If x and y both equal 5, the expression is true. If either x or y does not equal 5, the expression is false.

Both sides must be true for the entire expression to be true and for the conditional statement to execute.

## OR Operator

The logical OR operator evaluates two expressions and if either one is true, the expression is true:

```if ((x == 5) || (y == 5)) {
// do something here
}
```

If either x or y equals 5 or both equal 5, the expression is true. If x equals 5, the compiler never checks y at all.

## NOT Operator

A logical NOT statement reverses a normal expression, returning true if the expression is false and false if the expression is true. Here's a statement that uses one:

```if (!(grade < 70)) {
// do something here
}
```

This expression is true if grade is 70 or greater and false otherwise.

This NOT expression accomplishes the same thing by looking for grades that are not less than 70.