[Python learning] Fibonacci sequence Fibonacci Sequence

A simple Fibonacci sequence, with the following code:

# Filename: fibonaci.py# author by: stephendef fib(n):        #定义一个函数叫 fib()    if n <= 1:     #定义数列的前两个元素为1 1        return n    else:        return(fib(n-1)+fib(n-2))    #根据斐波那契数列的特性第n个元素等于前两个元素之和nterms = int(input("which element do you want to calculate of fibonacci?"))if nterms <= 0:    #判断如果用户输入的是负数或零就不计算    print("please input positive number!")else:    print("Fibonaci is : ")    for i in range(nterms):        print i, fib(i)

[Python learning] Fibonacci sequence Fibonacci Sequence