Convert Fahrenheit into Celsius Program in Java

In this tutorial, we are going to learn a python program to convert Fahrenheit into Celsius. This program will be simple because we have a Fahrenheit to Celsius conversion formula for this temperature conversion. We will use this conversion formula in our java program for this conversion.

Our Fahrenheit to Celsius conversion program behavior

• Our Java program will take a Fahrenheit temperature as an input.
• Now we will use Fahrenheit to Celsius conversion formula which is ((fahrenheit32)*5)/9.
• After applying the above formula, result will be a temperature in Celsius.

Java Program to Convert Fahrenheit into Celsius

import java.util.*;
public class Main
{
    public static void main(String[] args) {
        float celsius, fahrenheit;
        System.out.println("Program to convert Fahrenheit to Celsius" );
        Scanner sc = new Scanner(System.in);
        System.out.println("Please give the Fahrenheit Temperature");
        fahrenheit= sc.nextFloat();
        celsius = ((fahrenheit-32)*5)/9;
        System.out.printf("Celsius = %.2f",celsius);
    }
}

Output

Program to convert Fahrenheit to Celsius
Please give the Fahrenheit Temperature
98
Celsius = 36.67

Explanation

For the input Fahrenheit temperature 96.8.

Celsius temperature = ((96.8 -32)*5)/9 = 36.00

Program Explanation

1). Imports and Class Definition

import java.util.*;
public class Main

• import java.util.*;: This line imports all the classes from the java.util package, which includes the Scanner class used for reading user input.
• public class Main: This defines a new public class named Main. In Java, code is organized in classes, and Main is the name of our class where our program code resides.

2). Main Method

public static void main(String[] args)

This is the main method where the execution of our program begins. It’s the entry point that the Java Virtual Machine (JVM) calls when it runs the program.

3). Variable Declaration

float celsius, fahrenheit;

Here, two float variables, celsius and fahrenheit, are declared. Float is chosen because temperatures can have decimal values, and we need to accommodate that precision.

4). Scanner for User Input

Scanner sc = new Scanner(System.in);

A Scanner object named sc is created to read input from the standard input stream (typically the keyboard). This object will help us capture the temperature in Fahrenheit entered by the user.

5). Prompt User for Input

System.out.println("Please give the Fahrenheit Temperature");
fahrenheit = sc.nextFloat();

The user is prompted to input the Fahrenheit temperature. The nextFloat() method of the Scanner object sc is used to read a floating point number entered by the user and store it in the variable fahrenheit.

6). Calculate Celsius

celsius = ((fahrenheit - 32) * 5) / 9;

• The formula to convert Fahrenheit to Celsius is (𝐹𝑎ℎ𝑟𝑒𝑛ℎ𝑒𝑖𝑡−32)×5/9 ​. This line of code applies the formula to the value in fahrenheit and stores the result in celsius.

7). Output the Result

System.out.printf("Celsius = %.2f", celsius);

Finally, the converted temperature is printed out. printf is used here to format the output to two decimal places, which is typical for displaying temperatures.