Logical Operators in C ++

   Logical Operators in C++

Logical operators in C++ are used to combine multiple conditions or expressions into a single logical expression. They are essential for making decisions and controlling the flow of execution in your programs.

Types of Logical Operators:

 * Logical AND (&&)

   * Returns true only if both operands are true.

   * Example: (a > 0) && (b < 10)

 * Logical OR (||)

   * Returns true if at least one of the operands is true.

   * Example: (a == 5) || (b == 10)

 * Logical NOT (!)

   * Reverses the logical state of its operand.

   * Example: !(a > 0)

Truth Table:

| Operator | Operand 1 | Operand 2 | Result |

|---|---|---|---|

| && | true | true | true |

| && | true | false | false |

| && | false | true | false |

| && | false | false | false |

| ` |  | ` | true |

| ` |  | ` | true |

| ` |  | ` | false |

| ` |  | ` | false |

| ! | true |  | false |

| ! | false |  | true |

Example:

#include <iostream>

int main() {

    int a = 5, b = 10;

    if ((a > 0) && (b < 20)) {

        std::cout << "Both conditions are true." << std::endl;

    }

    if ((a == 3) || (b == 10)) {

        std::cout << "At least one condition is true." << std::endl;

    }

    if (!(a < 0)) {

        std::cout << "a is not less than 0." << std::endl;

    }

    return 0;

}

Output:

Both conditions are true.

At least one condition is true.

a is not less than 0.

Key Points:

 * Logical operators are used to combine conditions in if, else if, while, for, and other control flow statements.

 * The && operator has higher precedence than the || operator.

 * Parentheses can be used to control the order of evaluation.

 * Logical operators are essential for writing complex decision-making logic in your C++ programs.