range
Create a sequence of integers with the given step.
Python 3.13
range(stop)
range(start, stop[, step])Parameters
- startintoptional
- The first number of the sequence, 0 by default.
- stopint
- The end of the sequence; this number is not included.
- stepintoptional
- The difference between numbers, 1 by default; can be negative but not zero.
Return value
A range object, an immutable sequence; wrap it in list() to get a list.
Examples
Numbers from 0 to 4
Python 3.13
print(list(range(5)))[0, 1, 2, 3, 4]
Start, stop and step
Python 3.13
print(list(range(2, 10, 3)))[2, 5, 8]
Countdown with a negative step
Python 3.13
print(list(range(5, 0, -1)))[5, 4, 3, 2, 1]
Details
range(5) produces the numbers from 0 to 4. The numbers are not stored in memory but computed during iteration, so even range(10**9) is created instantly.