条件语句的几种经典写法

Summary of Article: Writing a Function to Determine Adulthood Based on Age

This article discusses various methods to write a simple function that determines if a person is an adult or a minor based on their age. It progresses from complex to simplified approaches, showcasing different coding styles and logical principles.

1. Most Common Approach

The article starts by outlining the most commonly used method involving if-else statements. This is a basic use-case for if-else logic, and for multiple conditions, a sequence of if-elif-else statements is employed to filter through different conditions.

2. Simplified if-else

Next, the article presents a simplified version of the if-else approach, streamlining the decision-making process in the function.

3. Utilizing and-or Logic

The article then explains the use of and-or logic in logical assertions, where 'a' is returned if the condition is true, and 'b' is returned if the condition is false. This illustrates a concise way to output based on a logical condition.

4. Changing return Statement's Default Value

Another method introduced changes the default return values of the assessment statement. Instead of returning True or False, the function assigns specific meanings to these values, such as "adult" for True when the age is greater than 17.

5. Returning Binary Values (0,1)

The article also describes how to return binary values where True equates to 1 and False to 0. This method uses the numerical representation of boolean values to indicate adulthood or minority.

6. String Value Extraction

Finally, the article presents a classic method using string value extraction. Depending on the correctness of the condition, it either returns "minor" sliced from the first character onwards, indicating adulthood, or the entire string, indicating minority. This technique is highlighted as the most classic and can be used even outside of a function.

In conclusion, the article provides a range of techniques for writing a function that determines whether a person is an adult based on their age, showcasing the versatility of coding methods from the most common to the most elegant.