Repetition Statements

Before learning, I did not have a deep understanding of the use of for and while loops, especially how to choose the appropriate loop structure to solve specific problems. I may not realize that there are differences in the applicable scenarios of the two, and I am not very clear about how to predict the output based on a given code, especially when loops are involved. However, after learning, I learned to distinguish and use these two loop structures correctly. for loops are suitable for scenarios with a known number of iterations or when a known data set needs to be traversed, while while loops are more suitable for repeatedly executing when a certain condition is met until the condition is no longer true. I also learned how to analyze the control logic of the loop based on the code, predict the output, and understand the change process of variables at each iteration. In addition, I can flexibly adjust the control conditions of the loop to ensure that the program outputs as expected and avoid potential problems such as infinite loops. Through this study, I not only improved my understanding of loop control, but also enhanced my ability to write code and choose the most appropriate loop structure according to different needs. This makes me more handy when programming and can solve problems more efficiently.

Before learning, I didn't know how to convert the code of while and for loops into flowcharts, nor did I understand how to derive the corresponding code from flowcharts. I may not be familiar enough with the control structure of loops and the expression of flowcharts, especially when it comes to the number of iterations, loop conditions and exit mechanisms. I don't know how to accurately represent these in flowcharts. After learning, I learned how to convert the logic of while and for loops into flowcharts. For for loops, I learned to visually display the iteration process by drawing the start, conditional judgment and increment steps of the number of loops. For while loops, I learned how to represent the conditions and update operations of the loop to ensure that the flowchart can clearly reflect when the loop ends. Conversely, I also learned how to extract code from the flowchart and gradually convert it into the correct while or for loop structure to ensure that the code is consistent with the logic of the flowchart. This gave me a deeper understanding of loops.

Before learning, I was not completely clear about the errors that are easy to occur in while and for loops, especially how to distinguish common logical errors from syntax errors. As I learned more, I realized that in these loop structures, common errors are usually related to factors such as loop conditions, number of iterations, and step length. In while and for loops, common syntax errors are usually related to the code structure not conforming to Python's specifications, causing the program to fail to run. For example, in a while loop, if you forget to add a colon after the conditional statement, or the internal code is not indented correctly, Python will throw a syntax error. Similarly, in a for loop, if the parameters of the range() function are used incorrectly, or the in keyword is omitted, syntax errors will occur. In addition, incorrect parentheses or undefined loop control variables are also common problems. For example, if you forget to add a comma after the parameters in range() when using a for loop, or if the control variable is not defined before the loop starts, the program will fail to execute. By carefully checking the structure and symbol usage in the code, these syntax errors can be effectively avoided and the correct operation of the program can be ensured.

0 being “no idea”; 5 being “I feel can confidently do it in any situation”

4 out of 5 - Represent a loop visually (flowchart)

4 out of 5 - Write code to loop code for specific number of times, using a For Loop

4 out of 5 - Write code to loop code for an unknown number of times, using a While Loop

4 out of 5 - Apply a break and continue statement when needed

3 out of 5 - Write a Python program that uses loops, to make the code more efficient

I felt this way about Write a Python program that uses loops, to make the code more efficient because I feel that I am not yet proficient in that. Although I know that loops can help reduce code duplication and automate certain tasks, when using loops to optimize code, I sometimes write code that is functional but not efficient. For example, sometimes I write redundant loops or do not realize the use of break and continue to end loops early or skip unnecessary steps, which reduces the efficiency of the code. For more complex programs, how to design efficient loops and reduce unnecessary calculations is still an area I need to strengthen.

In order to improve my ability to write efficient loop code, I plan to improve it in a number of ways. First, I will improve code efficiency by practicing optimization algorithms, especially reducing unnecessary loop iterations and avoiding redundant calculations. Second, I will learn and draw on common optimization techniques, especially using break and continue in loops to end loops early or skip unnecessary steps. In addition, by solving real programming problems, I can better understand how to apply loops in complex tasks and focus on performance optimization. Finally, I will review my code regularly, look for parts that can be optimized, and actively seek feedback from mentors or classmates. Through these methods, I believe I can improve my ability to write efficient loop code and be more comfortable with complex programming tasks.

Working in a group at a multi-person code and learn station has benefited my learning in multiple ways. First, working with teammates provides a great opportunity to share ideas and solve problems together. Each group member has a unique perspective, and discussing different approaches often helps to understand complex concepts or learn a new approach that I hadn't considered. In addition, dividing tasks according to individual strengths makes the process more efficient and allows us to focus on specific areas. This also provides opportunities for peer learning, and I can observe different coding styles and techniques, helping me improve my own coding practices.

However, there are challenges with teamwork. One of the biggest difficulties is communication. Sometimes team members have different ideas about how to implement a feature or solve a problem, which leads to misunderstandings or conflicting approaches. Without proper discussion, this can lead to confusion and wasted time. Another challenge is uneven distribution of work. Sometimes some members take on more responsibilities than others, leading to frustration or burnout.

To address these challenges, a variety of strategies can be implemented. Improving communication is key, so before starting a task, communicate in advance, make plans, and ensure that everyone has the same workload and the same goals. When starting a task, if you find that you have different ideas or ideas, speak up in time and communicate with other group members to resolve the problem. By addressing these challenges, group work can become a more productive and enjoyable experience.