JAVA练习（九九乘法表、使用循环输出等腰三角形）

需求一：打印出九九乘法表

public class MultiplicationTable 
{public static void main(String[] args){int a;int b;int c;for(int i = 1; i < 10; i++){for(int j = 1; j <= i; j++){a = i;b = j;c = a * b;System.out.print(a + " * " + b + " = " + c + "    ");}System.out.println("\n");}}
}

需求二：使用循环输出等腰三角形      

 

import java.util.Scanner;
public class IsoscelesTriangle 
{public static void main(String[] args){System.out.println("请输入一个整数：");//在输出端输入一个数Scanner input = new Scanner(System.in);int num = input.nextInt();for(int i = 1; i <= num; i++){int a = num - i;while(a != 0){System.out.print(" ");a--;}int b = i * 2 - 1;while(b != 0) {System.out.print("*");b--;}System.out.println("\n");}		}
}