static long calculate ( int bit_cnt ) {
  long res = 1 ;
  while ( bit_cnt -- > 0 ) {
    res = res * 3 ;
  }
  return res ;
}

static long calculate ( int bit_cnt ) { long res = 1 ; while ( bit_cnt -- > 0 ) { res = res * 3 ; } return res ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (update_expression (identifier)) right: (decimal_integer_literal))) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))))) (return_statement (identifier))))