public static void main ( String [ ] args ) {
  for ( int i = 1 ;
  i <= 10 ;
  i ++ ) System . out . println ( "For n = " + i + ", " + countPairs ( i ) + " pair exists\n" ) ;
}

public static void main ( String [ ] args ) { for ( int i = 1 ; i <= 10 ; i ++ ) System . out . println ( " For ▁ n ▁ = ▁ " + i + " , ▁ " + countPairs ( i ) + " ▁ pair ▁ exists \n " ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (string_literal) right: (identifier)) right: (string_literal)) right: (method_invocation name: (identifier) arguments: (argument_list (identifier)))) right: (string_literal))))))))