The range() function generates a sequence of numbers.

It is commonly used with for loops.

• range(stop)
• range(start, stop)
• range(start, stop, step)

• Start value is included.
• Stop value is excluded.
• Default start is 0.
• Default step is 1.

for i in range(5):
    print(i)

for i in range(1, 6):
    print(i)

for i in range(1, 11, 2):
    print(i)

Use a negative step for reverse order.

for i in range(10, 0, -1):
    print(i)

If a valid sequence cannot be generated, the range is empty.

Use range() for counters, indexes, sums, and repeated sequences.