private static int sumOfDigits ( int number ) {
  if ( number <= 0 ) return 0 ;
  int sum = 0 ;
  while ( number > 0 ) {
    sum += number % 10 ;
    number /= 10 ;
  }
  return sum ;
}

private static int sumOfDigits ( int number ) { if ( number <= 0 ) return 0 ; int sum = 0 ; while ( number > 0 ) { sum += number % 10 ; number /= 10 ; } return sum ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (return_statement (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))))) (return_statement (identifier))))