how to sort a list in python using for loop

sorting a list in python using a for loop is a fundamental exercise that helps you understand how sorting algorithms work. while python provides built-in methods like `sort()` and `sorted()`, implementing sorting manually can give you valuable insights.

here, i'll guide you through a simple implementation of the bubble sort algorithm using a for loop. bubble sort is one of the simplest sorting algorithms, though not the most efficient for large datasets.

### what is bubble sort?

bubble sort works by repeatedly stepping through the list to be sorted, comparing adjacent elements, and swapping them if they are in the wrong order. this process is repeated until no swaps are needed, indicating that the list is sorted.

### steps to implement bubble sort

1. **create a function** that takes a list as input.
2. **use nested loops** to compare each pair of adjacent items.
3. **swap** them if they are in the wrong order.
4. **repeat** the process until the list is sorted.

### code example

here's a simple implementation of bubble sort using a for loop in python:

### explanation of the code

1. **function definition**: we define a function `bubble_sort(arr)` that takes a list `arr` as input.
2. **length calculation**: we calculate the length of the list `n`.
3. **outer loop**: the outer loop runs `n` times, where `i` represents the current pass through the list.
4. **inner loop**: the inner loop runs from `0` to `n - i - 1`. this is because after each pass, the largest unsorted element is placed at the end of the list, so we can ignore it in subsequent passes.
5. **comparison and swap**: within the inner loop, we compare each pair of adjacent elements (`arr[j]` and `arr[j + 1]`). if the first element is greater than the second, we swap them using tuple unpacking.
6. **return**: finally, we return the sorted list.

### output

when you run the code, you will see the following output:

### conclusion

this tutorial demonstrated how to sort a list in python using a for ...

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