Okay. So first, we assign best_num to be the first number,

then we loop through every number.

So, after we assign best_num to be the first number,

then we loop through every number.

So first, n is going to be nine and we

say is nine greater than best num which is nine? It's not.

So, we then loop through you to the next number three.

Is three greater than nine?

It's not. So, we loop through to the next number eight.

Is eight greater than nine? It's not.

So, we loop through to the next number 11 and then now,

when n is 11, we say,

is 11 greater than nine? It is.

So, we reassign best_num from nine to instead be 11 and then,

we loop through to the next number five

and rather than comparing it to nine because best_num is now 11,

we compare, is five greater than 11?

It is not. So, we loop through to the next number 29 and

we ask is 29 greater than 11? It is.

So, we reassign best_num to be 29 and then,

after we've done that,

n is now two and we're asked is two greater than 29?

It's not. So, at that point,

because we've gone through all the numbers in our sequence,

then we're done with this for-loop.

When we're done with this for-loop,

best_num has been assigned to 29 and so,

we print out 29.

So in other words, our strategy for

max value accumulation is to keep track of the highest value that we've seen so far,

and then to loop through every item in the sequence,

and if we see a number higher than the highest one that we've seen so far,

then reassign our highest that we've seen so far to that higher number.

We know that by the time this for-loop is done running,

then best_num, it's going to be the largest number that's in our sequence.

So, when you run this code,

we should expect 29 to print out and we see that it does.

If I change this sequence to instead have 50 instead of five,

then we should now expect 50 to print out and so on.

If I change this to be 200,

200 would print out.

So, it always prints out the largest number in this sequence.

So, in this question, we're asked what is printed by the following statements?

So, we assign s to the string we are learning,

then we assign x to be zero.

So, x here is our accumulator variable,

s is the sequence that we're iterating over and we say,

if i is in a, b,

c, d, e. So,

in other words, if it's one of these characters,

then assign x to be x plus one,

then at the end, we print out what's the value of x.

So, this is the accumulation pattern and we're

accumulating the number of characters that are a,

b, c, d and e. So,

in order to answer this question,

we have to count the number of a, b, c,

d's and e's in the string s. So I see, 1, 2,

3, 4, 5 and so,

I expect the answer to be five.