A. Introduction:

How do you know if a program runs correctly or not? You check the results, or the output of the program. Sometimes the output is data, sometimes the output is a pattern like a Christmas tree. When printing out data values, you might want to generate the output in a certain format. For instance, dollar values should always have 2 decimal places, $2 should be $2.00.

B. *System.out.println(), System.out.print() and System.out.printf()*

We know

*System.out.println()*prints strings, values of expressions, or both.*System.out.print()*is similar, but always prints on the same line*System.out.printf()*allows you to "format" the output such as the number of decimal places. For instance,*System.out.printf("%.2f", Math.PI)*prints Pi value with two decimal places.How to use

__System.out.printf()____?__

C. Try:

Did you print out a Christmas tree? Can you print a star on the tree top?

How to print out a dollar amount with leading $ and two decimal places?

How to print out two decimal values that are right aligned? For example,

4. Write a program that prints an animal speaking a greeting, similar to but different from the following. Notice to print '\', you need to enter '\\'. Learn more about escape sequences __here__.

/\_/\ ----- ( ' ' ) / Hello \ ( - ) < Junior | | | | \ Coder!/ (__|__) -----

If x value changes, v does not, because of the fact that it divides itself after being times by ten. Which means no matter the answer of x, it will end up as ten, and 10-7=3

You got it :)

Check out this link:

https://www.wikihow.com/Read-Someone%27s-Mind-With-Math-(Math-Trick)Can you implement more tricks?

Yes, you can, and I've already done the math to explain why it works.

If you change the value of x then the value of v does not change, because you are just multiplying x times 10 and then dividing that solution by x to get v which = 3. So, the value of v does not change.

Changing the value of x will not change the value of y, and the answer is always 3.

the value of v won't change because you are basically dividing x by itself and then multiplying that by 10.