1.访问[(1, 10), (2, 20), (3, 30)]列表中元组的每个元素(使用for循环和while循环)
2.打印9 * 9乘法表
a.使用双层for循环实现
b.使用双层while循环来实现
c.使用单层while循环来实现(可选) 1.访问[(1, 10), (2, 20), (3, 30)]列表中元组的每个元素(使用for循环和while循环) for循环
list_data = [(1, 10), (2, 20), (3, 30)]
for i in list_data:
print(i)
for y in i:
print(y)
（1, 10) (2, 20) (3, 30) 3 30while循环
list_data = [(1, 10), (2, 20), (3, 30)]
index = 0
print(len(list_data))
while index < len(list_data):
print(list_data[index])
index = index + 1
index2 = 0
while index2 < len(list_data[index]):
print(list_data[index][index])
index = index3 + 1
2.打印9 * 9乘法表
a.使用双层for循环实现
for x in range(1, 10):
for y in range(1, x+1):
print(x, "*", y, "=", x*y, end=" " )
print("n")
1 * 1 = 1 2 * 1 = 2 2 * 2 = 4 3 * 1 = 3 3 * 2 = 6 3 * 3 = 9 4 * 1 = 4 4 * 2 = 8 4 * 3 = 12 4 * 4 = 16 5 * 1 = 5 5 * 2 = 10 5 * 3 = 15 5 * 4 = 20 5 * 5 = 25 6 * 1 = 6 6 * 2 = 12 6 * 3 = 18 6 * 4 = 24 6 * 5 = 30 6 * 6 = 36 7 * 1 = 7 7 * 2 = 14 7 * 3 = 21 7 * 4 = 28 7 * 5 = 35 7 * 6 = 42 7 * 7 = 49 8 * 1 = 8 8 * 2 = 16 8 * 3 = 24 8 * 4 = 32 8 * 5 = 40 8 * 6 = 48 8 * 7 = 56 8 * 8 = 64 9 * 1 = 9 9 * 2 = 18 9 * 3 = 27 9 * 4 = 36 9 * 5 = 45 9 * 6 = 54 9 * 7 = 63 9 * 8 = 72 9 * 9 = 81
b.使用双层while循环来实现
a = 1
while a <= 9:
b = 1
while b <= a:
print(str(a)+"*"+str(b)+"="+str(a*b),end="t") # end="t"的作用是对齐，"t"就是制表符
b += 1
print()
a += 1
1 * 1 = 1 2 * 1 = 2 2 * 2 = 4 3 * 1 = 3 3 * 2 = 6 3 * 3 = 9 4 * 1 = 4 4 * 2 = 8 4 * 3 = 12 4 * 4 = 16 5 * 1 = 5 5 * 2 = 10 5 * 3 = 15 5 * 4 = 20 5 * 5 = 25 6 * 1 = 6 6 * 2 = 12 6 * 3 = 18 6 * 4 = 24 6 * 5 = 30 6 * 6 = 36 7 * 1 = 7 7 * 2 = 14 7 * 3 = 21 7 * 4 = 28 7 * 5 = 35 7 * 6 = 42 7 * 7 = 49 8 * 1 = 8 8 * 2 = 16 8 * 3 = 24 8 * 4 = 32 8 * 5 = 40 8 * 6 = 48 8 * 7 = 56 8 * 8 = 64 9 * 1 = 9 9 * 2 = 18 9 * 3 = 27 9 * 4 = 36 9 * 5 = 45 9 * 6 = 54 9 * 7 = 63 9 * 8 = 72 9 * 9 = 81
