Question

loop_statement ::=

forever statement_or_null

| repeat ( expression ) statement_or_null

| while ( expression ) statement_or_null

| for ( for_initialization ; expression ; for_step )

statement_or_null

| do statement_or_null while ( expression ) ;

| foreach ( array_identifier [ loop_variables ] ) statement

for_initialization ::=

list_of_variable_assignments

| data_type list_of_variable_assignments { , data_type list_of_variable_assignments }

for_step ::= for_step_assignment { , for_step_assignment }

for_step_assignment ::=

operator_assignment

| inc_or_dec_expression

loop_variables ::= [ index_variable_identifier ] { , [ index_variable_identifier ] }