YY The year, using 2 digits.

Two Digit

Two Digit Apostrophe

YYYY The year, using 4 digits.

So if we're going to to think about whether 4 is divisible, you just look at the last two digits.

We'll end up getting 28, 18, and 21.

Because we can have 2 significant digits.

By contrast, your place of birth is more likely to include letters rather than numbers.

And so you can view this as really two separate problems.

So between the leading digit and the decimal sign.

So for instance 2d prints the numerical argument here with two digits self minutes also comes in two digits, self seconds also comes in two digits.

So everything we've done so far are a bunch of digits times a one digit number.

The period is strictly limited by the length of the initial seed.

And, ooh, 13. How spooky!

So we're gonna investigate that in more detail on this next slide.

So let's say we want to multiply thirty six times instead of putting a one digit number here,

But we go from a nine, eight, seven, six, five on this digit, on the second digit.

So just as a quick example, if I have 2.00 times (I don't know) 3.5 my answer over here can only have 2 significant digits

I need to make sure that they are all working properly.

Let's do two hundred thirty nine times six.

Since 1989, the country has performed at a double digit rate every year for the last 20 years.

AB 22. And another two digit number, sir?

It's too short.

Well, if you think about it, there's a pretty natural way to break a number with a bunch of digits into a couple numbers with fewer digits.

You start at the right, you add the 2 numbers up.

I will try and race you to the answer.

For example, over here they regular that your birth date be specified as two digits, two more digits, and four more digits corresponding the month, the day, or the year.

Well, you count all the digits up to the 2, behind the decimal.

We carry the one, but we carry it into the hundreds place.

So let's look for a two digit number in the string July 28, 1921.

Seven? Seven?

How many digits are there in your number?

I count all of the digits, all of the leading 0's behind the decimal, including the leading non zero numeral.

Wow! I really should have known that one.

We can't say it's exactly two steps after or one step, because the day could be one digit or two digits.

Two years.

So I can only have 3 significant figures in my product.

We actually want leading zeros in here and we want hours, minutes, and seconds separated by colons.

My fifth and final phrase

Been doing a little conducting on the side.

This was 3, this is 2.

So you should have as an answer either a six digit or probably a seven digit number.

BG So fifth grade math is where that's going on right now?

BG So fifth grade math is where that's going on right now?

These 4 values take the names N11, N10, N01, and N00, respectively.