Functions combining values in an expression such as +, -, &&.
Operators represent operations in an expression. Binary operators have two operands in an expression, and unary operators can have just one. This is a software concept, dealing with programming. See C++.
Perform actions on one or more variables, literals, or expressions and evaluate to a single value.
symbols that represent processes to be carried out.
Symbols and words used to express conditions for selection criteria in a query.