An expression-statement evaluates a given expression. The value computed by the expression, if any, is discarded.

expression-statement

statement-expression ;

statement-expression

invocation-expression

object-creation-expression

assignment

post-increment-expression

post-decrement-expression

pre-increment-expression

pre-decrement-expression

Not all expressions are permitted as statements. [Note: In particular, expressions such as x + y and x == 1, that merely compute a value (which will be discarded), are not permitted as statements. end note]

Execution of an expression statement evaluates the contained expression and then transfers control to the end point of the expression statement. The end point of an expression-statement is reachable if that expression-statement is reachable.