static int digitSum ( int num ) {
  int s = 0 ;
  while ( num != 0 ) {
    s = s + num % 10 ;
    num = num / 10 ;
  }
  return s ;
}

static int digitSum ( int num ) { int s = 0 ; while ( num != 0 ) { s = s + num % 10 ; num = num / 10 ; } return s ; }
(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: (identifier) right: (decimal_integer_literal))) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))))) (return_statement (identifier))))