**一、实验目的** 学会while循环和for循环 **二、实验环境** Python3.5、 Xfce终端、vim **三、实验内容** 1.while循环（1）斐波那契（Fibonacci）数列（2）幂级数（3）乘法表（4）一些打印星号的例子 2.列表 3.for循环 4.continue语句 5.循环的 else 语句 6.棍子游戏 **四、实验步骤** 1.while循环语法： while condition: statement1 statement2 在解释器中输入： n = 0 while n < 11: print(n) n += 1 然后按回车看结果 2. 斐波那契（Fibonacci）数列（1）输入代码： #!/usr/bin/env python3 a, b = 0, 1 while b < 100: print(b) a, b = b, a + b 运行（2）输入代码： #!/usr/bin/env python3 a, b = 0, 1 while b < 100: print(b, end=' ') a, b = b, a + b print() 运行 3. 幂级数输入代码： #!/usr/bin/env python3 x = float(input("Enter the value of x: ")) n = term = num = 1 result = 1.0 while n <= 100: term *= x / n result += term n += 1 if term < 0.0001: break print("No of Times= {} and Sum= {}".format(n, result)) 运行 4. 乘法表输入代码： #!/usr/bin/env python3 i = 1 print("-" * 50) while i < 11: n = 1 while n <= 10: print("{:5d}".format(i * n), end=' ') n += 1 print() i += 1 print("-" * 50) 运行 5. 一些打印星号的例子 <1>#!/usr/bin/env python3 row = int(input("Enter the number of rows: ")) n = row while n >= 0: x = "*" * n print(x) n -= 1 <2> #!/usr/bin/env python3 n = int(input("Enter the number of rows: ")) i = 1 while i <= n: print("*" * i) i += 1 <3>#!/usr/bin/env python3 row = int(input("Enter the number of rows: ")) n = row while n >= 0: x = "*" * n y = " " * (row - n) print(y + x) n -= 1 6.列表 a = [ 1, 342, 223, 'India', 'Fedora'] a a[0] a[4]等 7.for 循环 a= ['ShiYanLou', 'is', 'powerful'] for x in a: print(x) a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] for x in a[::2]: print(x) 等 8. continue 语句 #! / usr/ bin / env python3 while True: n = int(input("Please enter an Integer: ")) if n < 0: elif n == 0: break print("Square is ", n ** 2) print("Goodbye") 9.循环的 else 语句 for i in range(0, 5): print(i) else: print("Bye bye") 10.棍子游戏 #!/usr/bin/env python3 sticks = 21 print("There are 21 sticks, you can take 1-4 number of sticks at a time.") print("Whoever will take the last stick will loose") while True: print("Sticks left: " , sticks) if sticks == 1: print("You took the last stick, you loose") break sticks_taken = int(input("Take sticks(1-4):")) if sticks_taken >= 5 or sticks_taken <= 0: print("Wrong choice") continue print("Computer took: " , (5 - sticks_taken) , "\n") sticks -= 5 **五、实验数据** 略 **六、实验总结** 本次实验，了解的两种循环：while 和 for 循环，其中的 for 循环我们通常与 range() 函数配合使用，要特别注意的是，range() 函数返回的并不是列表而是一种可迭代对象。 for 循环的 else 子句给我们提供了检测循环是否顺利执行完毕的一种优雅方法。

“Python3 简明教程”实验报告