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    • Home
    • > Tutorials
    • > Python

    Python range examples

    on Feb 11, 2016

    Python range can be used to generate a range of numbers with desired start number and gap. It is often used in for loops.

    Usage:

    range(stop)
    range(start, stop[, step])
    

    Here are some examples.

    range to generate 0 to N-1

    a = range(10)
    print "type=%s" % (type(a))
    print a
    print "==outcome of for loop==="
    for i in range(10):
      print i
    
    type=<type 'list'>
    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
    ==outcome of for loop===
    0
    1
    2
    3
    4
    5
    6
    7
    8
    9
    
    Env: Python 2.7.16

    range with start, stop

    This generates range from start to stop-1

    for i in range(5,10):
      print i
    5
    6
    7
    8
    9
    
    Env: Python 2.7.16

    range with start, stop, step

    This generates range start, start+step,… Ntoe that outcome will not include stop.

    for i in range(5,10, 3):
      print i
    5
    8
    
    Env: Python 2.7.16

    Additional notes

    Note that if you are working on large data then it would be more memory efficient to use xrange.

    Suggested posts:

    1. Python xrange examples
    2. Python map examples
    3. Python filter list/iterable examples
    4. Python for loop examples
    5. Python itertools imap examples
    6. Python itertools ifilter examples
    7. Python find length of string or list using len()
    8. python print examples
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    Posted in Tutorials | Tagged Python, Python array, Python built-in functions, Tutorials

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