等腰三角形
正等腰三角形右半部分
#
##
###
####
#####
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); for(int i = 1; i <=n; i++) { for(int j=1;j<=i;j++) { System.out.print("#"); } System.out.println(); } } }
正三角形左半部分
#
##
###
####
#####
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); for(int i =1; i <=n; i++) { for(int j=1;j<=n-i;j++) { System.out.print(" "); } for(int j=1;j<=i;j++){ System.out.print("#"); } System.out.println(" "); } } }
正等腰三角形
#
###
#####
#######
#########
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); for(int i =1; i <=n; i++) { for(int j=1;j<=n-i;j++) { System.out.print(" "); } for(int j=1;j<=i;j++){ System.out.print("#"); } for(int j=2;j<=i;j++) { System.out.print("#"); }//或for(int j=1;j<=2*i-1;j++) System.out.println(); } } }
倒三角形右半部分
#####
####
###
##
#
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); for(int i = n; i >=1; i--) { for(int j=i;j>=1;j--) { System.out.print("#"); } System.out.println(); } } }
倒三角形左半部分
#####
####
###
##
#
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); for(int i = n; i >=1; i--) { for(int j=n-1;j>=i;j--) { System.out.print(" "); } for(int j=i;j>=1;j--) { System.out.print("#"); } System.out.println(); } } }
倒三角形
#########
#######
#####
###
#
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); for(int i = n; i >=1; i--) { for(int j=n-1;j>=i;j--) { System.out.print(" "); } for(int j=i;j>=1;j--) { System.out.print("#"); } for(int j=i-1;j>=1;j--) { System.out.print("#"); }//或for(int j=2*i-1;j>=1;j--)
System.out.println(); } } }