java九九乘法表-for循环打印

双层for循环

for (int i = 1; i <= 9; i++) {
	for (int j = 1; j <= i; j++) {
	    if (j == i) {
			System.out.print(j + "*" + i + "=" + i * j);
		} else {
			System.out.print(j + "*" + i + "=" + i * j + "t");
		}
	}
	System.out.println();
}

单层for循环

第一种:

for (int i = 1, j = 1; i <= 9;) {
	if (j == i) {
		System.out.print(j + "*" + i + "=" + i * j);
	} else {
		System.out.print(j + "*" + i + "=" + i * j + "t");
	}
	j++;
	if (j > i) {
	    i++;
		j = 1;
		System.out.println();
	}

}

第二种:

for (int i = 1, j = 1; i <= 9 && j <= i; j++) {
	if (j == i) {
	    System.out.print(j + "*" + i + "=" + i * j);
		System.out.println();
		i++;
		j = 0;
	} else {
		System.out.print(j + "*" + i + "=" + i * j + "t");
	}
}