In JSONata, everything is an expression. An expression comprises values, functions and operators which, when evaluated, produces a resulting value. Functions and operators are applied to values which themselves can be the results of evaluating sub-expressions. In that way, the language is fully composable to any level of complexity.
Parenthesized expressions and blocks
Used to override the operator precedence rules. E.g.
(5 + 3) * 4
Used to compute complex expressions on a context value
Product.(Price * Quantity)- both Price and Quantity are fields of the Product value
Used to support 'code blocks' - multiple expressions, separated by semicolons
(expr1; expr2; expr3)
Each expression in the block is evaluated in sequential order; the result of the last expression is returned from the block.