6.循环

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']
# for x in a:
#     print(x)


a = [['apple','orange','banana','grape'],(1,2,3)]
for x in a:
    for y in x:
        if y == 'orange':
            break
        print(y,end=' ')
        # print(y,end='
')
else:
    print('fruit is gone')


# a = [1,2,3]
# for x in a:
#     if x == 2:
#         break
#         # continue
#     print(x)
# else:
#     print('EOF')

# for x in range(0,10):
#     print(x)

# for x in range(0,10,2):
#     print(x,end=' | ')

# for x in range(10,0,-2):
#     print(x,end=' | ')

a = [1,2,3,4,5,6,7,8]
# for i in range(0,len(a),2):
#     print(a[i],end=' | ')

b = a[0:len(a):2]
print(b)