python 中使用 for 循环 while 循环打印9 * 9乘法表

for a in range(1, 10):
    for b in range(1, a + 1):
        print(a, '*', b, '=', a * b, end='t')
    print()

运行结果：

i = 1
while i < 10:
    j = 1
    while j < i + 1:
        print(i, "*", j, "=", i * j, end="t")
        j += 1
    print()
    i += 1

运行结果：

i = 1
j = 1
while j < 10:
    print(i, '*', j, '=', i * j, end='t')
    if i == j:
        i = 0
        j += 1
        print()
    i += 1

运行结果：

1）：用 for 循环：

dict_var = {1: 10, 2: 20, 3: 30}
for i in dict_var.items():
    for j in i:
        print(j, end="; ")

运行结果：