Roman numerals are a type of number system used to represent a fixed decimal number. Several letters from the Latin alphabet are used for the representation of roman numerals. In this tutorial, the user will learn how to convert a decimal number to roman using JavaScript. Seven symbols represent Roman numerals: I, V, X, L, C, D, and M. The values for symbols are given below. Syntax I is 1 V is 5 X is 10 L is 50 C is 100 D is 500 M is 1000 Using these seven symbols user can convert decimal numbers to roman. ... Read More

You can try to run the following code to change the alert message text color. To change the text color of the alert message, use the following custom alert box. We’re using JavaScript library, jQuery to achieve this and will change the alert message text color to “#FCD116” −ExampleLive Demo                                function functionAlert(msg, myYes) {             var confirmBox = $("#confirm");             confirmBox.find(".message").text(msg);             confirmBox.find(".yes").unbind().click(function() {     ... Read More

You will not be able to change the style of a standard alert box in JavaScript. To change the style, use the following custom alert box. We’re using JavaScript library, jQuery to achive this.ExampleLive Demo                                function functionAlert(msg, myYes) {             var confirmBox = $("#confirm");             confirmBox.find(".message").text(msg);             confirmBox.find(".yes").unbind().click(function() {                confirmBox.hide();             });     ... Read More

To count the number of occurrences of a character in a string, try to run the following code −ExampleLive Demo                    function displayCount() {             setTimeout(function() {                var str = document.getElementById('str1').value;                var letter = document.getElementById('letter1').value;                letter = letter[letter.length-1];                var lCount;                for (var i = lCount = 0; i < str.length; lCount += (str[i++] == letter));                document.querySelector('p').innerText = lCount;                return lCount;             }, 50);          }             Enter String:       Enter Letter:       Click for Result       result=    

In this tutorial, we will learn to display the image in the alert or confirm box in JavaScript. The alert() is the JavaScript method that displays the alert or confirms box on the top center of the screen when you invoke it.As a programmer and user, you have seen on many websites that they ask you for confirmation in the dialog box before you delete any precious thing in your user's account. Also, the alert box can be helpful to show some information when a user comes into the web page or a message.So, the default alert box can have only ... Read More

To show an image in alert box, try to run the following code. Here, an alert image is added to the custom alert box −ExampleLive Demo                                function functionAlert(msg, myYes) {             var confirmBox = $("#confirm");             confirmBox.find(".message").text(msg);             confirmBox.find(".yes").unbind().click(function() {                confirmBox.hide();             });             confirmBox.find(".yes").click(myYes);         ... Read More

The best way to initialize a number in JavaScript is to initialize variables while declaring them. Through this, you can easily avoid undefined values.ExampleYou can try to run the following code to initialize a number −Live Demo                    var deptNum = 20, id = 005;          document.write("Department number: "+deptNum);          

To design a custom JavaScript alert box, try to run the following code. The code uses a JavaScript library jQuery and CSS to create a fancy alert box different from the standard JavaScript alert box −ExampleLive Demo                                function functionAlert(msg, myYes) {             var confirmBox = $("#confirm");             confirmBox.find(".message").text(msg);             confirmBox.find(".yes").unbind().click(function() {                confirmBox.hide();             }); ... Read More

In this tutorial, we will learn to change the button label in the confirm box using JavaScript. The confirm box is useful for taking the confirmation from the user. For example, when you try to delete something from your account on some websites, they show you a popup box containing a message like “Are you sure to delete ….?”. Also, it contains the yes and no buttons, which is one kind of confirmation the application takes from the users. JavaScript users can create the confirm box using the .confirm() method, which contains the confirmation message string, ok, and cancel button. ... Read More

In this tutorial, we will learn to remove the decimal part of the number in JavaScript. While working with JavaScript, many times, developers need to play with the numbers stored in the database and needs to convert float and double numbers into the pure decimal or integer number.In this situation, developers can have multiple methods to truncate the decimal part of the number. We will see different approaches to overcome the above problem.Using the Math.trunc() methodUsing the Bitwise operatorsUsing the Math.ceil() and Math.floor() methodUsing the Math.Trunc() methodThe Math.trunc() is the most popular method to remove the decimal part of JavaScript. ... Read More