An expression is a combination of symbols including numbers, operators, variables and groupings that are used to specify a mathematical function. Expressions result in a numerical value.
The following are examples of expressions:
53 + 7'x' + 4('x' + 5) - 'y'(3 + (('x' - 'y') * 12)) - 1'x' > 9('x' > 3) and ('y' < 5)(('myShow' + 1) > 5) or 'maintenanceMode'
These examples demonstrate the use of operators (such as +, -, >, and and), variables (such as ‘x’, ‘y’, and ‘maintenanceMode’) and groupings (using parenthesis).
The following sections explain each of these expression components in detail: