Program Logic Expression (LE) calculates and analyzes the logical (Boolean) expression. Supports logical operators: negation, conjunction, disjunction, exclusive disjunction, implication and equivalence. Supports work with: up to 500 (five hundred) members of expression, up to 338 (three hundred thirty eight) variables and n levels of parenthesis. Serves as a useful tool for developers when calculating and analyzing logical expressions. Can also serve as a means of educationally. Thanks to the use of this product.