For loop question

Question

Can anyone help me out in describing below for loop that how it works step by step, please?

a = 2
b = 3
for i in range (b):
a = a + a * i
print (a)

Output: 12

Answer 1

Hi Dolan ,
Let me try to explain-

First the variables a and b are initialized by 2 and 3,
Then the loop,
here variable i is by default initialized with 0 and the loop will run like-

for(i=0;i<3;i++)

Each step increase value of a, according to the given equation.

Initially, a = 2 + 2 * 0 =2
then, a = 2 + 2 * 1 = 4
then the last iteration, a = 4 + 4 * 2 = 12

Thus, we get 12 as the output.

Answer 2

sorry !!😫🙇

Answer 3

The for loop that is used to iterate over elements of a sequence, it is often used when you have a piece of code which you want to repeat "n" number of time.

It works like this: " for all elements in a list, do this"

Answer 4

a and b are the variables and there is + operator, so

the loop will run 3 times , after third condition the loop will not work because the condition is false.

step 1 -
a= 2 + 2 * 0 = 2

step 2 -
a= 2 + 2 * 1 = 4

step 3 -
a= 4 + 4 * 2 = 12

thus, we get 12 as our answer

Answer 5

iteration 1:
i = 0; a = 2 + 2 * 0 = 2
iteration 2:
i = 1; a = 2 + 2 * 1 = 4
iteration 3:
i = 2; a = 4 + 4 * 2 = 12

Answer 6

Thank you all 🙏

Answer 7

Prabhat Singh , Is step 3 correct?

Answer 8

I know the basics of for loop, but I need more detailed about this example.