Python: range() function

range() function

The range() function is used to get a sequence of numbers, starting from 0 by default, and increments by 1 by default, and ends at a specified number.

Note: Sequence Types - list, tuple, range etc.

Version:

(Python 3.2.5)

Syntax:

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

Parameter: 

Return value:

Returns an immutable sequence object of integers.

Example-1: Python range() function

# empty range
print(list(range(0)))

# using range(stop)
print(list(range(12)))

# using range(start, stop)
print(list(range(1, 15)))

Output:

[]
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]

Pictorial Presentation:

Pictorial Presentation:

Example-2: Python range() function

print(range(10))

print(range(0, 30, 5))

print(range(0, -10, -1))

Output:

# range upto 10
print(range(10))

# range upto 30 but 5 step jumps
print(range(0, 30, 5))

# range() works with negative
print(range(0, -10, -1))

Example-3: Python range() works with negative step

# range upto 10
print(list(range(10)))

# range upto 30 but 5 step jumps
print(list(range(0, 30, 5)))

# range() works with negative step
print(list(range(0, -10, -1)))

Output:

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
[0, 5, 10, 15, 20, 25]
[0, -1, -2, -3, -4, -5, -6, -7, -8, -9]

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