for _ in range(nums) code example

Example 1: how to iterate through range in python

for i in range(start, end):
    dosomething()
#The i is an iteration variable that you can replace by anytthing. You do not need to define it.

Example 2: for i in range(n-1,0,-1):

# Print first 5 numbers using range function
for i in range(5):
    print(i, end=', ')

# Output:
# 0, 1, 2, 3, 4,

Example 3: range(n,n) python

# if numbers are same in the range function then,
# the range function outputs empty range
# this is because, there are no integers b/w n and n
for i in range(1,1):
  print("runs")

# prints nothing