python经典代码
    下面是一些经典的Python代码示例：
    1. Hello World程序：
    ```python
    print("Hello, World!"```
    2. 计算两个数的和：
    ```python
    a = 5
    b = 10
    sum = a + b
    print("The sum is:" sum)
    ```
    3. 判断一个数是否为素数：
    ```python
    num = int(input("Enter a number: "is_prime = True
    if num > 1:
    for i in range(2, num):
    if (num % i) == 0:
    is_prime = False
    break
    if is_pri
    print(num, "is a prime number"else:
    print(num, "is not a prime number"```
    4. 反转字符串：
    ```python
    string = input("Enter a string: "reversed_string = string[::-1]
    print("Reversed string:" reversed_string)
    ```
    5. 斐波那契数列：
    ```python
    def fibonacci(n):
    if n <= 0:
    return []
    elif n == 1:
    return [0]
    elif n == 2:
    return [0, 1]
    else:
    fib = [0, 1]
    for i in range(2, n):
    fib.append(fib[-1] + fib[-2])
    return fib
    num_terms = int(input("Enter the number of terms: "fib_sequence = fibonacci(num_terms)
    print("Fibonacci sequence:" fib_sequence)python新手代码示例
    ```
    这些代码示例包括了常见的Hello World程序、数学计算、判断、字符串处理和递归等方面的经典代码。