JavaScript Program to Convert Fahrenheit to Celsius

Introduction

Temperature conversion between Fahrenheit and Celsius is a common task in many applications. To convert Fahrenheit to Celsius, you can use the following formula:

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

This program will help convert a given temperature from Fahrenheit to Celsius using JavaScript.

Problem Statement

Create a JavaScript program that:

• Accepts a temperature in Fahrenheit.
• Converts the temperature to Celsius.
• Returns and displays the result in Celsius.

Example:

• Input: 77°F

• Output: 25°C

• Input: 32°F

• Output: 0°C

Solution Steps

1. Read the Input Temperature: Provide the temperature in Fahrenheit either by user input or directly within the code.
2. Convert Fahrenheit to Celsius: Use the formula Celsius = (Fahrenheit - 32) * 5/9.
3. Display the Result: Print the result in Celsius.

JavaScript Program

// JavaScript Program to Convert Fahrenheit to Celsius
// Author: https://www.javaguides.net/

function convertFahrenheitToCelsius(fahrenheit) {
    // Step 1: Apply the conversion formula
    let celsius = (fahrenheit - 32) * 5/9;

    // Step 2: Return the result
    return celsius;
}

// Example input
let fahrenheitTemperature = 77;
let celsiusTemperature = convertFahrenheitToCelsius(fahrenheitTemperature);
console.log(`${fahrenheitTemperature}°F is equal to ${celsiusTemperature.toFixed(2)}°C`);

Output

77°F is equal to 25.00°C

Example with Different Input

let fahrenheitTemperature = 32;
let celsiusTemperature = convertFahrenheitToCelsius(fahrenheitTemperature);
console.log(`${fahrenheitTemperature}°F is equal to ${celsiusTemperature.toFixed(2)}°C`);

Output:

32°F is equal to 0.00°C

Explanation

Step 1: Apply the Conversion Formula

• The formula to convert Fahrenheit to Celsius is:  let celsius = (fahrenheit - 32) * 5/9; This formula is used to calculate the Celsius equivalent of the Fahrenheit temperature.

Step 2: Return the Result

• The function returns the result, which is printed using console.log(). The result is rounded to two decimal places using toFixed(2).

Conclusion

This JavaScript program demonstrates how to convert a temperature from Fahrenheit to Celsius using a simple mathematical formula. Temperature conversion is a basic task in many applications, and this solution provides an easy way to handle it in JavaScript.