Matching Pairs UNIT 4 VocabOnline version more help. by Cristobal Garcia 1 Expression: 2 Assignment Operator: 3 Function Call: 4 Conditional Statement: 5 Function: 6 Boolean Value: 7 String: 8 Comparison Operators: 9 Variable: 10 Logical operator: a named reference to a value that can be used repeatedly throughout a program. a combination of operators and values that evaluates to a single value a data type that is either true or false. affect the sequential flow of control by executing different statements based on the value of a Boolean expression. a named group of programming instructions. Also referred to as a “procedure”. , =, ==, != indicate a Boolean expression NOT, AND, and OR, which evaluate to a Boolean value. a command that executes the code within a function allows a program to change the value represented by a variable an ordered sequence of characters.