can any one explain me this program how dictionary is updated

Question

https://code.sololearn.com/cXGBghPJeFnr

need a good explanation

Answer 1

when loop runs first x[n] is assigned 'b'

So x[1]="b"

Then n is incremented and is 2 now

Again x[2] is assigned the next value in arr i.e. 'c'

So x[2]='c'
and so on

Answer 2

Abhay... for x[n] in arr... Are we assigning array values to x[key]?

Answer 3

Gireesh Desineni yes
For example
When the following loop runs

for i in arr:
print(i)

What does i prints? All the values in arr and for it to do that each value from arr is assigned to i