A truth table is a mathematical table used in logic to determine the truth values of logical expressions based on their variables. Each row of the table represents a possible combination of truth values for the variables, typically true (T) or false (F). By systematically listing these combinations, truth tables help visualize how different inputs affect the outcome of logical operations like AND, OR, and NOT. Truth tables are essential in fields such as computer science, mathematics, and philosophy for analyzing logical statements and designing circuits. They provide a clear and organized way to evaluate complex logical expressions, making it easier to understand how different conditions interact and lead to specific results.