用python完成1-100的加法

用for来实现

sum = 0
for i in range (1,101):
sum = sum+i 
print sum;

 

用while来实现

sum = 0
i=1
while i<=100:
sum=sum+i
i+=1
print sum

 

目前只会这两种方式，学了新的以后再补充