JavaScript - Simple Temperature Converter

Submitted by razormist on Monday, January 14, 2019 - 16:53.
In this tutorial we will create a Simple Temperature Converter using JavaScript. JavaScript is a scripting or programming language that allows you to implement complex things on web pages. It is widely used in designing a stunning website. It is an interpreted programming language that has a capabilities of Object-Oriented. This code can be used as your calculator to any mathematical problem. So Let's do the coding...

Getting started:

This is the link for the bootstrap that i used for the layout design https://getbootstrap.com/.

The Main Interface

This code contains the interface of the application. To create this just write these block of code inside the text editor and save this as index.html. 
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. 	<head>
  4. 		<meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1"/>
  5. 		<link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
  6. 	</head>
  7. <body>
  8. 	<nav class="navbar navbar-default">
  9. 		<div class="container-fluid">
  10. 			<a class="navbar-brand" href="https://sourcecodester.com">Sourcecodester</a>
  11. 		</div>
  12. 	</nav>
  13. 	<div class="col-md-3"></div>
  14. 	<div class="col-md-6">
  15. 		<h3 class="text-primary">JavaScript - Simple Temperature Converter</h3>
  16. 		<hr style="border-top:1px dotted #ccc;" />
  17. 		<div class="col-md-6">	
  18. 			<div class="alert alert-info">Fahrenheit to Celcius</div>
  19. 			<div style="border:1px solid #000; padding:20px; border-radius:10px;">
  20. 				<div class="form-group">
  21. 					<input type="number" id="fahrenheit1" placeholder="Enter number here" class="form-control"/>
  22. 				</div>
  23. 				<div class="form-group">
  24. 					<input type="text" id="celcius1" class="form-control" readonly="readonly"/>
  25. 				</div>
  26. 				<center><button class="btn btn-success" onclick="convertToCe();">Convert</button></center>
  27. 			</div>
  28. 		</div>
  29. 		<div class="col-md-6">
  30. 			<div class="alert alert-info">Celcius to Fahrenheit</div>
  31. 			<div style="border:1px solid #000; padding:20px; border-radius:10px;">
  32. 				<div class="form-group">
  33. 					<input type="number" id="celcius2" placeholder="Enter number here" class="form-control"/>
  34. 				</div>
  35. 				<div class="form-group">
  36. 					<input type="text" id="fahrenheit2" class="form-control" readonly="readonly"/>
  37. 				</div>
  38. 				<center><button class="btn btn-success" onclick="convertToFa();">Convert</button></center>
  39. 			</div>
  40. 		</div>
  41. 	</div>
  42. <script src="js/script.js"></script>
  43. </body>
  44. </html>

Creating the Script

This code contains the script of the application. This code will automatically calculate the temperature of a person. To do this just copy and write these block of codes as shown below inside the text editor and save it as script.js inside the js folder. 
  1. function convertToCe(){
  2. 	var fahrenheit1 = document.getElementById("fahrenheit1").value;
  3. 	if(fahrenheit1 != ""){
  4. 		var number = parseFloat(fahrenheit1);
  5. 		document.getElementById("celcius1").value = (number - 32)/1.8 + "\xB0C";
  6. 	}else{
  7. 		alert("Please enter something");
  8. 	}
  9. }
  10.  
  11. function convertToFa(){
  12. 	var celcius2 = document.getElementById("celcius2").value;
  13. 	if(celcius2 != ""){
  14. 		var number = parseFloat(celcius2);
  15. 		document.getElementById("fahrenheit2").value = (number * 9/5) + 32 + "\xB0F";
  16. 	}else{
  17. 		alert("Please enter something");
  18. 	}
  19. }
There you have it we successfully created a Simple Temperature Converter using JavaScript. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

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