public class Change{

	public static void main(String[] args){	
	 	char n1 = '\n';
	 	char n2 = 49;//char n2 = '1';
	 	char n3 = 50;//char n2 = '2';
	 	char n4 = 51;//char n2 = '3';
	 	char n5 = '\t';
	 	char n6 = '\r';
	 	char n7 = '\\';//有一个是转义字符。
	 	/*
	 	
	 	竟然把\，敲成/了。
	 	 */

	 	System.out.println(n1);
        System.out.println(n2);
        System.out.println(n3);
        System.out.println(n4);
        System.out.println(n5); 
        System.out.println(n6);
        System.out.println(n7);
      

	}
}