Java How To Program (Early Objects)
10th Edition
ISBN: 9780133807943
Author: Deitel, Paul
Publisher: Pearson Education
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Chapter 2, Problem 22.1E
Circumference and Area of a Circle) Here’s a peek ahead. In this chapter, you learned about integers and the type int. Java can also represent floating-point numbers that contain decimal points, such as 3.14159. Write an application that inputs from the user the radius of a circle as an integer and prints the circle’s diameter, circumference and area using the floating-point value 3.14159 for π. Use the techniques shown in Fig. 2.7. [Note: You may also use the predefined constant Math.PI for the value of π. This constant is more precise than the value 3.14159. Class Math is defined in package java.lang. Classes in that package are imported automatically, so you do not need to import class Math to use it.] Use the following formulas (r is the radius):
diameter = 2r
circumference = 2πr
area = πr2
Do not store the results of each calculation in a variable. Rather, specify each calculation as the value that will be output in a System.out.printf statement. The values produced by the circumference and area calculations are floating-point numbers. Such values can be output with the format specifier %f in a System.out.printf statement. You’ll learn more about floatingpoint numbers in Chapter 3.
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Chapter 2 Solutions
Java How To Program (Early Objects)
Ch. 2 - Fill in the blanks in each of the following...Ch. 2 - Fill in the blanks in each of the following...Ch. 2 - Fill in the blanks in each of the following...Ch. 2 - Fill in the blanks in each of the following...Ch. 2 - Fill in the blanks in each of the following...Ch. 2 - Fill in the blanks in each of the following...Ch. 2 - Prob. 1.7SRECh. 2 - State whether each of the following is true or...Ch. 2 - State whether each of the following is true or...Ch. 2 - State whether each of the following is true or...
Ch. 2 - State whether each of the following is true or...Ch. 2 - State whether each of the following is true or...Ch. 2 - Write statements to accomplish each of the...Ch. 2 - Write statements to accomplish each of the...Ch. 2 - Write statements to accomplish each of the...Ch. 2 - Prob. 3.4SRECh. 2 - Prob. 3.5SRECh. 2 - Write statements to accomplish each of the...Ch. 2 - Prob. 4.1SRECh. 2 - Identify and correct the errors in each of the...Ch. 2 - Write declarations, statements or comments that...Ch. 2 - Write declarations, statements or comments that...Ch. 2 - Prob. 5.3SRECh. 2 - Write declarations, statements or comments that...Ch. 2 - Write declarations, statements or comments that...Ch. 2 - Write declarations, statements or comments that...Ch. 2 - Write declarations, statements or comments that...Ch. 2 - Write declarations, statements or comments that...Ch. 2 - Write declarations, statements or comments that...Ch. 2 - Write declarations, statements or comments that...Ch. 2 - Write declarations, statements or comments that...Ch. 2 - Using the statements you wrote in Exercise 2.5,...Ch. 2 - Fill in the blanks in each of the following...Ch. 2 - Fill in the blanks in each of the following...Ch. 2 - Fill in the blanks in each of the following...Ch. 2 - Fill in the blanks in each of the following...Ch. 2 - Prob. 1.5ECh. 2 - Fill in the blanks in each of the following...Ch. 2 - Write Java statements that accomplish each of the...Ch. 2 - Write Java statements that accomplish each of the...Ch. 2 - Write Java statements that accomplish each of the...Ch. 2 - Prob. 3.1ECh. 2 - State whether each of the following is true or...Ch. 2 - State whether each of the following is true or...Ch. 2 - State whether each of the following is true or...Ch. 2 - Assuming that x = 2 and y = 3, what does each of...Ch. 2 - Assuming that x = 2 and y = 3, what does each of...Ch. 2 - Assuming that x = 2 and y = 3, what does each of...Ch. 2 - Prob. 4.4ECh. 2 - Prob. 5.1ECh. 2 - Which of the following Java statements contain...Ch. 2 - Prob. 5.3ECh. 2 - Which of the following Java statements contain...Ch. 2 - Given that y=ax3+7, which of the following are...Ch. 2 - Given that y=ax3+7, which of the following are...Ch. 2 - Given that y=ax3+7, which of the following are...Ch. 2 - Given that y=ax3+7, which of the following are...Ch. 2 - Given that y=ax3+7, which of the following are...Ch. 2 - Given that y=ax3+7, which of the following are...Ch. 2 - State the order of evaluation of the operators in...Ch. 2 - Prob. 7.2ECh. 2 - State the order of evaluation of the operators in...Ch. 2 - Display the message "Enter an integer: ", leaving...Ch. 2 - Assign the product of variables b and c to the int...Ch. 2 - Use a comment to state that a program performs a...Ch. 2 - Prob. 9.1ECh. 2 - (Comparing Integers) Write an application that...Ch. 2 - Which of the following Java statements contain...Ch. 2 - Given that y = ax3 + 7, which of the following are...Ch. 2 - State the order of evaluation of the operators in...Ch. 2 - What does the following code print?...Ch. 2 - What does the following code print?...Ch. 2 - What does the following code print?...Ch. 2 - What does the following code print?...Ch. 2 - (Largest and Smallest Integers) Write an...Ch. 2 - (Odd or Even) Write an application that reads an...Ch. 2 - Write an application that reads two integers,...Ch. 2 - Write an application that displays a checkerboard...Ch. 2 - Circumference and Area of a Circle) Heres a peek...Ch. 2 - (Integer Value of a Character) Heres another peek...Ch. 2 - (Separating the Digits in an Integer) Write an...Ch. 2 - Prob. 25.1ECh. 2 - Prob. 26.1ECh. 2 - (Body Mass Index Calculator) We introduced the...Ch. 2 - (World Population Growth Calculator) Search the...
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