1.while 循环
counter =1
while counter <= 10:
counter += 1
print(counter)
else:
print("EOF")
2.for 循环
a=[['apple','orange','banana','grape'],(1,2,3)]
for x in a:
for y in x:
print(y,end=',')
else:
print("fruit is gone",end='n')
3.break 和 continue
a = [1,2,3,4,5]
for x in a:
if x ==2:
continue
print(x) # 1,3,4,5
else:
print("EOF")
print("===============")
a = [1,2,3,4,5]
for x in a:
if x ==2:
break
print(x) # 1
else:
print("EOF")
print("===============")
for x in range(10,0,-1):
print(x)
