Can someone explain this for me? Why the answer will be 10?

Question

https://code.sololearn.com/cL4Z9CQwn1bf/?ref=app

Answer 1

1+(1+1)+(1+1+1)+(1+1+1+1)

Answer 2

@Calvin
@Justin Hill
Thanks alot!

Answer 3

count = 0
for i in range (5):
for j in range (i):
count +=1

Everytime Your loop runs, it runs the second loop however many times the first loop is currently on. so

1st run of i runs j 0 times.
count=0

2nd run of i runs j 1 time.
count=1

3rd run of i runs j 2 times.
count=2
count=3

4th run of i runs j 3 times.
count=4
count=5
count=6

and your final run of i runs j 4 times.
count=7
count=8
count=9
count=10

Run this code. I often use print functions to see what is happening. Maybe it will help clear it up

count = 0
for i in range (5):
print("i = {}".format(i))
for j in range (i):
count +=1
print("count = {}".format(count))