How to Reverse a Range in Python
To create a reverse range in Python pass a negative value as the third argument of the range()
function. This value is the number of steps to take between each number in a range.
To demonstrate this, let's create a list of numbers from 0-5 in descending order.
numbers = range(5, 0, -1)
for n in numbers:
print(n)
5
4
3
2
1
Reverse an Existing Python Range
To reverse an existing range, use the Python reversed()
function. Store the result in a new variable as it will not modify the original range.
numbers = range(1, 5)
numbers_desc = reversed(numbers)
for n in numbers_desc:
print(n)
4
3
2
1
numbers