static int sumOfDigits ( int n ) {
  String s = String . valueOf ( n ) ;
  int sum = 0 ;
  for ( int i = 0 ;
  i < s . length ( ) ;
  i ++ ) {
    sum += ( s . charAt ( i ) - '0' ) ;
  }
  return sum ;
}

static int sumOfDigits ( int n ) { String s = String . valueOf ( n ) ; int sum = 0 ; for ( int i = 0 ; i < s . length ( ) ; i ++ ) { sum += ( s . charAt ( i ) - '0' ) ; } return sum ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))))))) (return_statement (identifier))))