A conditional-expression has one of one of the following forms:
{ <expression> if <boolean-expression> [ <expression> if <boolean-expression>]*
<expression> otherwise }
{ if (<boolean-expression>) {[with-clause] <expression>} [
else if (<boolean-expression>) {[with-clause] <expression>}]*
else {[with-clause] <expression>} }Here expression must not be a conditional expression; nested conditional expressions are not allowed. See Expressions for information on other kinds of expressions.
Conditional expressions of the first form can contain a line break after a boolean-expression. Conditional expressions of the second form can contain a line break anywhere except within conjunctions or disjunctions (that is, except in between and/or clauses in a boolean-expression)
Each pair of curly braces within a conditional of the second form is optional in the absence of a with-clause.
A conditional expression evaluates to the value of the expression associated with the first boolean-expression that evaluates to true. If no boolean-expression evaluates to true, the conditional expression evaluates to the value of the expression associated with the otherwise or else.