Question about Sorting a List with Negative and Positive Numbers

[Than999]

Hi, I'm trying to sort this "List' of values that contains both negative and positive numbers. I'm trying to sort in numerical order from least to the greatest value using a double for loop and swapping variables. However, I ran into some errors when running my code, and I think it's because of the negative values in the "List" array. How do I get around this problem?


Here is my Python code that I have written so far:

numbers = [11.5, 28.3, 23.5, -4.8, 15.9, -63.1, 79.4, 80.0, 0, 67.4, -11.9, 32.6]

length_numbers = len(numbers)

for i in numbers:
  for j in range (0, length_numbers):
    
    if numbers[j] > numbers[j+1]:
      temp = numbers[j]
      numbers[j] = numbers[j+1]
      numbers[j+1] = temp

print(numbers)

[Larz60+]

just use:

>>> numbers = [11.5, 28.3, 23.5, -4.8, 15.9, -63.1, 79.4, 80.0, 0, 67.4, -11.9, 32.6]
>>> numbers.sort()
>>> numbers
[-63.1, -11.9, -4.8, 0, 11.5, 15.9, 23.5, 28.3, 32.6, 67.4, 79.4, 80.0]
>>>

[jefsummers]

But if you are trying to learn about writing a bubble sort, your error is in line 6. Since you are comparing numbers[j] to numbers[j+1], you will get an index error when j is length_numbers and you try to access numbers[j+1]. Change line 6 to

for j in range (0,length_numbers-1):

and it works just fine.