python作业1

sum1 = 0
for i in range(1, 101):
    sum1 = sum1 + 1 / i
print("sum1=%.6f" % sum1)

sum2 = 1
f = -1
for i in range(2, 101):
    sum2 = sum2 + 1 / i * f
    f = -f
print("sum2=%.6f" % sum2)

sum3 = 0
t = 0
for i in range(1, 101):
    t = t + i
    sum3 = sum3 + 1 / t
print("sum3=%.6f" % sum3)

a = 2
sum4 = 0
for i in range(6):
    sum4 = sum4 + a
    a = a * 10 + 2
print("sum4=", sum4)

sum5 = 1
t = 1
i = 1
while 1 / t > 1e-6:
    t = t * i
    sum5 = sum5 + 1 / t
    i += 1
print("sum5=%.6f" % sum5)

pi = 1
f = -1
i = 3
while 1 / i > 1e-6:
    pi = pi + 1 / i * f
    i = i + 2
    f = -f
print("pi=%.6f" % (pi * 4))

运行结果