python_while()응용

''' 출력양식
'''
== 1단 ==
1 1 1 = 1
1 1 2 = 2
1 1 3 = 3
1 2 1 = 2
1 2 2 = 4
1 2 3 = 6
1 3 1 = 3
1 3 2 = 6
1 3 3 = 9
== 2단 ==
2 1 1 = 2
2 1 2 = 4
2 1 3 = 6
2 2 1 = 4
2 2 2 = 8
2 2 3 = 12
2 3 1 = 6
2 3 2 = 12
2 3 3 = 18
== 3단 ==
3 1 1 = 3
3 1 2 = 6
3 1 3 = 9
3 2 1 = 6
3 2 2 = 12
3 2 3 = 18
3 3 1 = 9
3 3 2 = 18
3 3 3 = 27
'''

i = 1

while i <= 3 :
print("== {}단 ==" .format(i))

j = 1

while j <= 3 :
k = 1
while k <= 3 :
print("{} {} {} = {}" .format(i, j, k, i j k))
k += 1

j += 1

i += 1