LogicalAnd

The LogicalAnd internal function does a logical "and" operation on two to twenty 88-level condition-names or logical internal functions (IsNumeric, LogicalAnd, LogicalOr). If all of the arguments are true, the function returns the numeric value 1, which is the logical value of true. If any of the arguments are false, the function returns the numeric value 0, which is the logical value of false.