牛客网刷题-(10)

#1.利用循环语句,求1-100的立方和
sum = 0
i = 0
while i < 101:
    sum += i**3
    i = i + 1
print(sum)

#做法2: for 循环
s = 0
for i in range(1,101):
    s = s + i**3
print(s)

#2. 求第 n 个斐波那契数列的值
a = 1
b = 1
i = 1
n = int(input())
while n > i:
    a,b = b,a+b
    n -= 1
print(a)

#解法2
n = int(input())
a,b,i = 1,1,1
while i < n:
    a, b = b, a+b
    i += 1
print(a)

#解法3
n = int(input())
a,b = 1,1
for i in range(1,n):
    a,b = b,a+b
print(a)

#方法1:
for c in "python":
    print(c,end=" ")
print()
#方法2:
s = "piggylin"
for c in s:
    print(c,end=" ")