static String convertToString ( int sum ) {
  String str = "" ;
  while ( sum > 0 ) {
    str = str + ( char ) ( ( sum % 10 ) + '0' ) ;
    sum = sum / 10 ;
  }
  return str ;
}

static String convertToString ( int sum ) { String str = " " ; while ( sum > 0 ) { str = str + ( char ) ( ( sum % 10 ) + '0' ) ; sum = sum / 10 ; } return str ; }
(method_declaration (modifiers) type: (type_identifier) 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: (string_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: (cast_expression type: (integral_type) value: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (character_literal))))))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))))) (return_statement (identifier))))