Why the outpot of this code is 6?

Question

Hi this is the last question of the module 3 exam and I dont understand why its answer is 6

What is the output of this code?
def func(x):
res = 0
for i in range(x):
res += i
return res

print(func(4))

result

6

Answer 1

The first iteration: 0+0=0
The second iteration: 0+1=1
The third iteration: 1+2=3
The fourth iteration: 3+3=6

The answer is 6.

for i in range(6):
# some code

Means the following:

Start from 0 and end with 3

The last number doesn't turn on.

I hope, it will help 😊👍

Answer 2

It works like this,,,,--

for i in range(4):
res = 0 + i
res = 0 + 0 + 1 + 2 + 3 [range(4)->0123]
res = 6
return res

thus it returns 6

Answer 3

Hay bro see you had created a function to create a range and add all the elements of range so according to that when you entered 4 then it created a range of 3 no. I.e. 1,2 and 3 {last element is not counted while creating a range for ex range(1,3) will result in 1,2 and 3 will not be taken} so the sum of all the 3 no. Is 6 so it gives result as 6 .

Answer 4

for i in range(4), we have looping values of i as: 0,1,2,3

On first loop we have :
res=res+i (on substituting this simplifies as: 0=0+0)#res=0

Then, 2nd loop:
0=0+1 #res=1

then,
1=1+2 #res=3

At last,
3=3+3 >>res=6<<

If you have trouble understanding this you may refer to comments of that question.

Answer 5

It returns the sum of the inputs.

If you want to check. Change the input there to 10... See what the result is

Answer 6

thank you every one, I can understand a little more now