Simple code sharing for Python beginners

Easy-to-understand Python introductory code sharing

Python is a simple and easy-to-learn programming language with concise syntax and powerful functions. For beginners, a good introductory code example can make it easier for them to understand and master the basic concepts and syntax of Python. The following are several simple and easy-to-understand Python introductory code examples to help beginners get started quickly.

1. Print "Hello, World!"

   print("Hello, World!")

   This is a classic Python entry example, which will output "Hello, World!" to the console. Through this example, beginners can understand Python's basic output function print().

2. Calculating the sum of two numbers

   num1 = 10
   num2 = 20
   sum = num1 + num2
   print("两个数的和为：", sum)

   This example shows how to perform addition in Python using variables and arithmetic operators. Beginners can learn about variable assignment and basic arithmetic operations in Python.

3. Determine whether a number is even or odd

   num = int(input("请输入一个整数："))
   if num % 2 == 0:
    print(num, "是偶数")
   else:
    print(num, "是奇数")

   This example shows how to use the conditional statement if-else to determine whether a number is even or odd. Beginners can learn about conditional judgment and user input in Python.

4. Generate Fibonacci numbers

   n = int(input("请输入斐波那契数列的长度："))
   fibonacci = [0, 1]
   while len(fibonacci) < n:
    fibonacci.append(fibonacci[-1] + fibonacci[-2])
   print("斐波那契数列：", fibonacci)

   This example shows how to use loops and lists to generate Fibonacci numbers of a specified length. Beginners can learn the basic use of loops and lists in Python.

5. Count the number of characters in a string

   string = input("请输入一个字符串：")
   char_count = {}
   for char in string:
    char_count[char] = char_count.get(char, 0) + 1
   print("字符统计结果：", char_count)

   This example shows how to use a dictionary and a loop to count the number of each character in a string. Beginners can learn the basic use of dictionaries in Python and how to iterate over characters in a string.

These simple and easy-to-understand Python introductory code examples can help beginners master basic Python syntax and concepts faster. Through practice and further study, beginners can gradually improve their programming skills and begin to solve more complex problems. I wish every beginner success in the world of Python!

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