練習、ファイル

# range 1-2+3-4+...+99-100=？
count = 0
for i in range(1,101):
 if i % 2 == 0:
 count = count -i
 else:
 count = count + i
print(count)


#list         ，       
lis = ["yi","er","san","si"]
for i in lis:
 lis.remove(i)
print(lis)
#  ：['er', 'si']

#    
lis = [5,2,13,10,44,22]
i = 0
for j in range(7):
 while i < len(lis)-1:
 if lis[i] > lis[i+1]:
 lis[i],lis[i+1] = lis[i+1],lis[i] //  
 i = i+1
print(lis)