What is 'while loops' and what is it used for?

Question

In Control Structures, chapter no. 7 is While Loops.
What is the use of 'i = i + 1' in the following code?

i = 1
while i <=5:
print(i)
i = i + 1
print("Finished!")

Answer 1

Without i = i + 1 the loop would never stop because i would always be 1 which is called an infinite loop