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class Help {
	void helpon(int what) {
		switch(what) {
			case '1':
			System.out.println("The if:\n");
			System.out.println("if(condition) statement;");
			System.out.println("else statement;");
			break;
			case '2':
			System.out.println("The switch:\n");
			System.out.println("switch(expression) {");
			System.out.println("	case constant:");
			System.out.println("	statement sequence");
			System.out.println("	break;");
			System.out.println(" 	//...");
			System.out.println("}");
			break;
			case '3':
			System.out.println("The for:\n");
			System.out.println("for(init; condition; iteration)");
			System.out.println(" statement;");
			break;
			case '4':
			System.out.println("The while:\n");
			System.out.println("while(condition) statement;");
			break;
			case '5':
			System.out.println("The do-while:\n");
			System.out.println("do {");
			System.out.println("	statement;");
			System.out.println("} while(condition);");
			break;
			case '6':
			System.out.println("The break:\n");
			System.out.println("break; or break label;");
			break;
			case '7':
			System.out.println("The continue:\n");
			System.out.println("continue; or continue label;");
			break;
		}
		System.out.println();
	}

	void showMenu() {
		System.out.println("Help on:");
		System.out.println("	1. if");
		System.out.println("	2. switch");
		System.out.println("	3. for");
		System.out.println("	4. while");
		System.out.println("	5. do-while");
		System.out.println("	6. break");
		System.out.println("	7. continue\n");
		System.out.println("Choose one (q to quit): ");
	}

	boolean isValid(int ch) {
		if(ch < '1' | ch > '7' & ch != 'q') return false;
		else return true;
	}
}

class HelpClassDemo {
	public static void main(String args[])
	throws java.io.IOException {
		char choice, ignore;
		Help hlpobj = new Help();

		for(;;) {
			do {
				hlpobj.showMenu();
				choice = (char) System.in.read();
				do {
					ignore = (char) System.in.read();
				} while ( !hlpobj.isValid(choice));

				if(choice == 'q') break;

				System.out.println("\n");
				hlpobj.helpOn(choice);
				}
			}
		}
	}
}