public static int order ( long a ) {
  int o = 0 ;
  long d = 1 ;
  while ( d <= a ) {
    o ++ ;
    d *= 10 ;
  }
  return o ;
}

public static int order ( long a ) { int o = 0 ; long d = 1 ; while ( d <= a ) { o ++ ; d *= 10 ; } return o ; }
(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))) (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: (identifier))) body: (block (expression_statement (update_expression (identifier))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))))) (return_statement (identifier))))