练习题4

# 4、额，来个小插曲，写程序求出1-100的累加和。1+2+3+4+5+.....+100。
#1
sum =0
i = 1
while i<=100:
sum = sum + i
i+=1
print(sum)

#2
sum = 0
for i in range (1,101):
sum = sum+i
print(sum)