# 1+2+3+4+5+6+7+8+9+10
sum =1+2+3+4+5+6+7+8+9+10
print('sum=%d'%sum)
names = ['赵梦冰','张荣亮','侯富君','王颜丽','焦新瑞']
'''for循环'''
for name in names:
print(name)
# data = [1,2,3,4,5,6,7,8,9,10]
# data =list(range(1,11))
sum=0
for i in range(1,11):
sum =sum+i
print('sum=%d'%sum)
# s=0
# for n in data:
# s=s+n
# print('sum=%d'%sum)
data =list(range(101))
print(data)
s=0
n=len(data)
while n>0:
s=s+data[n-1]
n=n-2
print(s)
while n>0:
if data[n-1]%2==0:
s=s+data[n-1]
n=n-1
print(s)
s=0
for i in data:
if not i%2==0:
continue
s=s+i
print(s)
'''break'''
s=0
for i in data:
if not i%2==0:
continue
s=s+i
if s>1000:
break
print('s=%d,i=%d'%(s,i))
#双重循环
# for i in range(10):
# for j in range(10):
# print('tom')
for i in range(1,10):
for j in range(1,10):
if i>=j:
r=i*j
print('%d*%d=%d'%(i,j,r),end='\t')
print('\n')
for i in range(1,10):
for j in range(1,i+1):
print('%d*%d=%d'%(j,i,i*j),end='\t')
print()
3.键值对、字典
names = ['赵梦冰','张荣亮','侯富君','王颜丽','焦新瑞']
scores = [88,99,77,89,93]
#获取指定元素的下标
index = names.index('张荣亮')
print('index=%d'%index)
score =scores[index]
print('score=%d'%score)
'''
字典dict
是一组键key-值value对的集合
字典的查找速度特别快
字典的key是唯一的,value可以重复
字典是无序的
'''
name_scores= {'赵梦冰':88,'张荣亮':99,'侯富君':77,'王颜丽':89,'焦新瑞':93}
#根据key获取value
#get()方法,获取不到对应的value时,则返回None
score=name_scores['赵梦冰']
score=name_scores.get('白李娜')
print('score=%s'%score)
#添加键值对
name_scores['陈盼']=99
print(name_scores)
#修改
name_scores['侯富君']=97
print(name_scores)
#删除
name_scores.pop('侯富君')
print(name_scores)