1、
python
sum = 0
for i in range(1,100):
sum += 1/i
print(sum)
2、
python
sum = 0
f = 1
for i in range(1,101):
sum = sum + 1/i*f
f = -f
print(sum)
3、
python
sum = 0
t = 0
for i in range(1,101):
t = t + i
sum = sum + 1/t
print(sum)
4、
python
a = 2
sum = 0
for i in range(6):
sum += a
a = a*10 +2
print(sum)
5、
python
sum = 1
t = 1
i =1
while 1/t > 1e-6:
t = t * i
sum = sum + 1/t
i += 1
print(sum)
6、
python
sum = 1
f = -1
i = 3
while 1/i > 1e-6:
sum = sum + 1 / i * f
i += 2
f = -f
print(4*sum)