A quick start to Python programming for beginners: 5 basic code examples

Quick Start Python Programming: 5 Basic Code Cases

Python is a popular high-level programming language. It is easy to learn, has rich libraries and functions, and is It is widely used in data analysis, machine learning, website development and other fields. In this article, I will introduce you to 5 basic Python code cases to help you quickly get started with Python programming.

1. Print Hello World
   First, let’s write a classic Hello World program. In Python, printing can be done with just one line of code.

print("Hello World")

2. Calculate the sum of two numbers
   Next, we will write a simple program to calculate the sum of two numbers. First, we need to get input of two numbers from the user, then add them together, and output the result.

num1 = float(input("请输入第一个数："))
num2 = float(input("请输入第二个数："))

sum = num1 + num2

print("两数之和为：", sum)

3. Determining odd and even numbers
   Now, let us write a program to determine whether a number is odd or even. We will use the remainder operator to divide the given number by 2 and check if the remainder is 0.

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")

4. Judge leap year
   Let us write a program to determine whether a given year is a leap year. According to the leap year rules, ordinary years that are divisible by 4 and not divisible by 100 are leap years, and those that are divisible by 400 are also leap years.

year = int(input("请输入一个年份："))

if (year % 4 == 0 and year % 100 != 0) or year % 400 == 0:
    print(year, "是闰年")
else:
    print(year, "不是闰年")

5. Calculating Square Roots
   Finally, we will write a program to calculate the square root of a given number. We will use the sqrt function in the math library to implement the square root calculation.

import math

num = float(input("请输入一个正数："))

sqrt_num = math.sqrt(num)

print("平方根为：", sqrt_num)

These are 5 simple but important Python code examples that can help you get started with Python programming quickly. By learning these basics, you'll be able to understand and apply more complex programming concepts and techniques. I wish you success in learning and practicing Python programming!

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