Chapter 2, Problem 2.1PE

(Convert Celsius to Fahrenheit) Write a program that reads a Celsius degree in a double value from the console, then converts it to Fahrenheit, and displays the result. The formula for the conversion is as follows:

fahrenheit = (9 / 5) * celsius + 32

Hint: In Java, 9 / 5 is 1, but 9.0 / 5 is 1.8.

Here is a sample run:

Program Plan Intro

Convert Celsius to Fahrenheit

Program Plan:

• Define the class
  • Define the main method using public static main.
    • Declare the required variables.
    • Prompt the user to enter Celsius value.
    • Read the input
    • Convert it into Fahrenheit value.
    • Display the result on the screen.

Program Description Answer

The below program is used to convert Celsius to Fahrenheit.

Explanation of Solution

Program:

//class definition

public class Cel_Far

{

//Main method

public static void main(String[] args)

{

//declare scanner variable

Scanner in = new Scanner(System.in);

// Prompt the user to enter Celsius

System.out.print("Enter a temperature in Celsius: ");

//read the input

double celsius = in.nextDouble();

// Convert Celsius to Fahrenheit

double fh = (9.0 / 5) * celsius + 32;

// Display the result on the screen

System.out.println(celsius + " Celsius is " +

fh + " Fahrenheit");

}

}

Sample Output

Enter a temperature in Celsius: 43.5

43.5 Celsius is 110.3 Fahrenheit