why range used in python for loops code example

Example 1: range in while loop python

i = 1

while i in range(0,10):
    print("Hello world", i)
    i = i + 1
# OUTPUT
Hello world 1
Hello world 2
Hello world 3
Hello world 4
Hello world 5
Hello world 6
Hello world 7
Hello world 8
Hello world 9

print(i)
10

Example 2: python for loop range

#Python range() example
print("Numbers from range 0 to 6")
for i in range(6):
    print(i, end=', ')