Can someone help me why the output is 12

Question

https://code.sololearn.com/cPMhZPf6qI7v/?ref=app

Answer 1

Loop runs for b values of 3 and 4. These values are multiples and stored in a.

1 * 3 = 3
3 * 4 = 12

final output : 12

Answer 2

you are using (++b<5)where the value of b is 2 and a is 1
in first b is increment by 1 due to pre increment and become 3 so
a*=b become a=1*3=3 so now a become 3
then b is again increment by 1 and become 4 which is also satisfy the condition and then it goes to a
a*=b where a=3 b=4 so a*=b become 3*4=12
so final output shows a=12

Answer 3

got it now, change code & added comments to help me

Answer 4

thank you GAWEN

Answer 5

a=1 , b=2
while ++b<5
... ( now b=3)
a*=b
... (now a= a*b= 1*3= 3)

2nd time while loop continues(b=3 and a=3 as of now)

while ++b<5
... b is 4 now
a*=b
... a=a*b=3*4=12 now

3 rd time while loop starting to continue
(b=4 and a= 12 as of now)
... while ++b<5
but ++b=5 which is not greater than 5
// so program breaks out from while loop
// last value of a was 12
//it shows 12

Answer 6

thank you sayan

Answer 7

I'm a kid and I understand what there saying so you can to

Answer 8

okay lvl two with one code

Answer 9

I get b now = 3, but where is the 4 value come from, 3 * 4