A logical expression is a statement that can be evaluated as either true or false. It often involves logical operators such as AND, OR, and NOT, which help combine or modify conditions. For example, in the expression "A AND B," the result is true only if both A and B are true. Logical expressions are fundamental in fields like mathematics, computer science, and philosophy. They are used in programming to control the flow of operations, in algorithms to make decisions, and in Boolean algebra to simplify complex expressions. Understanding logical expressions is essential for problem-solving and reasoning.