Python for while

for i in range(1, 10):
    for j in range(1, i+1):
        print(f'{i} x {j} = {i * j}',end=' ')
    print()

i = 1
while i < 10:
    j = 1
    while j < i + 1:
        print(f'{i} x {j} = {i * j}', end=' ')
        j += 1
    print()
    i += 1

i = 1
while i < 10:
    for j in range(1, i + 1):
        print(f'{i} x {j} = {i * j}', end=' ')
    print()
    i += 1

x = True
while x:
    s = input('input:')
    if s == 'e':
        x = False
        print('exit , else 会运行')
    elif s == 'ee':
        print('exit , else 不会运行')
        break
    elif s == 'c':
        continue # 不做任何事情
    print('print:', s)
else:
    # beak时 不会执行
    print('hello')