sum1 = 0
for i in range(2,101,2):
sum1 = sum1 + i
print(sum1)
# 方式2
sum2 = 0
for i in range(101):
if i % 2 == 0:
sum2 = sum2 + i
print(sum2)
sum1 = 0
for i in range(2,101,2):
sum1 = sum1 + i
print(sum1)
# 方式2
sum2 = 0
for i in range(101):
if i % 2 == 0:
sum2 = sum2 + i
print(sum2)