java基础06—多重循环

循环中嵌套循环

外层循环执行一轮，内层循环执行一遍，总共执行次数n*m

public class Test3 {
	public static void main(String[] args) {
		//外层循环控制行数，内层循环控制列数
        for (int i = 1; i < 4; i++) {
			for (int j = 1; j < 7; j++) {
				System.out.print("=");
			}
			System.out.println();
		}
	}
}

public class GoHme2 {
	public static void main(String[] args) {
		for (int i = 1; i <= 6; i++) {//控制行
			for (int k = 1; k <= i - 1; k++) {//空格
				System.out.print(" ");
			}
			for (int j = 1; j <= 7 - i; j++) {//控制列
				System.out.print(j);
			}
			System.out.println();
		}
	}
}

2

public class GoHome {
	public static void main(String[] args) {
		for (int i = 1; i <= 9; i++) {//控制行
			for (int j = 1; j <= i; j++) {//控制列
				System.out.print(j + "*" + i + "=" + i * j + "  ");
			}
			System.out.println();
		}
	}
}