Use the built-in function range
print sum(range(1,101))
Use the function reduce
print reduce(lambda a,b:a+b,range(1,101))
use loop
n = 0
for x in range(101):
n = x + n
Use the built-in function range
print sum(range(1,101))
Use the function reduce
print reduce(lambda a,b:a+b,range(1,101))
use loop
n = 0
for x in range(101):
n = x + n