What is range

range() function returns a sequence of numbers:

• starting from 0 (by default)
• increments by 1 (by default)
• stops before a specified number

for n in range(6):
  print(n) # 0,1,2,3,4,5

Overriding default behaviors:

range(start, stop, step)

for n in range(3,6):
  print(n) # 3,4,5

for n in range(3,20,2):
  print(n) # 3,5,7,9,11,13,15,17,19