Expressions
Most computer programming languages consist of statements, which in turn, consist of expressions.(An expression is a specific combination of operators and operands, which evaluates to a particular result.You may have previously referred to expressions by the names formulas or equations.The operands can be variables, literals, or method calls that return a value.)
Although formulas and equations are not exactly the same thing as expressions, they are close enough to help you understand what expressions are and how they are used.