1.while循环

counter = 1while 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='\n')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)