基本语法课后作业

基本语法

1、求100以内的所有素数

c = 0
for x in range(2,100):
    for i in range(2,int( x ** 0.5)+1): 
        if x %  i == 0:
            break
    else:
        c += 1
        print(x)
print(c)

2、求任意整数的几何级数

a = 3
q = 2
n = 10
sum = 0
for i in range(1,n+1):
    sum += a * q ** i
print(sum)

3、求菲波那切数列的第101位

x = 0

y = 0

for i in range(0,102):

    if i == 0:

        y=1

    elif i == 1:

        x = 1

        y = 1

    else:

        tmp = y

        y = x + y

        x = tmp

print(y)