Question

java输出三角

*
**
***
****
*****

Answer 1

//Sanjiao.java
import java.util.Scanner;
public class Sanjiao{
public static void main(String[] args){
System.out.println("请输入长度:");
Scanner scanner=new Scanner(System.in);
int length=scanner.nextInt();
for(int i=0;i<length;i++){
for(int j=0;j<=i;j++){
System.out.print("*");
}
System.out.println();
}
}
}

Answer 2

public class test{
for(int i=0;i<6;i++){
for(int j=0;j<=i;j++){
System.out.print("*");
}
System.out.println();
}