Java Lesson 7 - Input From Keyboard
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Project - Going in Circles
The area of a circle is given by:
area = π (r2)
Now, suppose we know the area and wish to find r. Solving for r from this equation yields:
squareroot(area/π)
Write
a program (project and
class
both named RadiusOfCircle) that uses
sqrt(
) and PI from the Math
class to solve for the radius of
a circle.
Use keyboard
input to specify the area (provide for the possibility of area being a decimal fraction).
Write out your solution by hand and then enter it into the computer and run. Before inputting the area, put a prompt on the screen like this.
Write out your solution by hand and then enter it into the computer and run. Before inputting the area, put a prompt on the screen like this.
What is the area? _
(the underscore indicates the cursor waiting for input)
Present your answer like this:
Radius of your circle is 139.4.
Project - What's Your Name
From the keyboard enter your first and then your last name, each with its own prompt. Store each in a separate String and then concatenate them together to show your full name. Call both the project and the class FullName. When your program is finished running, the output should appear similar to that below:
What is your first name? Cosmo
What is your last name? Kramer
Your full name is Cosmo Kramer.
