Java入门之循环练习

1、打印九九乘法表

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

 

 

 

2、打印三角形

    public static void main(String[] args) {
        for (int i = 1; i <= 5; i++) {
            for (int j = 5; j >= i; j--){
                System.out.print(" ");
            }
            for (int k = 1; k <= i; k++){
                System.out.print("*");
            }
            for (int t = 1; t < i; t++){
                System.out.print("*");
            }
            System.out.println();
        }
    }