For this, use click() along with parseInt().Example Live Demo Document 10 addValue10EachTimePressMe    addValue = 0;    $("#addSequenceOf10").click(function() {       var actualValue = parseInt($("#add").html());       addValue =addValue+ actualValue;       $("#sequenceValue").html(addValue);    }); ... Read More

For iterating and printing, use forEach() loop in JavaScript.Exampleconst details =[    {       "studentId":101,       "studentName": "John Doe",    },    {       "studentId":102,       "studentName": "David Miller",    }, ]; details.forEach(obj=>{    console.log("StudentId="+obj.studentId);    console.log("StudentName="+obj.studentName); })To run the above program, ... Read More

You can use destructed array in this case.Examplefunction multiply(firstParameterDefaultValue=10, secondParameterValue) {    return firstParameterDefaultValue * secondParameterValue; } console.log("The result="+multiply(...[, 10]));To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo173.js.OutputThis will produce the following output −PS C:\Users\Amit\javascript-code> node demo173.js The result=100Read More

If you won’t pass value to a function(), it will print the default value otherwise given parameter will be printed.Following is the code. We are setting a default here i.e. “Jack” in this case to avoid any undefined error when a function is called without any parameter −Examplefunction display({ name ... Read More

Yes, we can use a new line using “” in console.log(). Following is the code −Exampleconst studentDetailsObject = new Object() studentDetailsObject.name = 'David' studentDetailsObject.subjectName = 'JavaScript' studentDetailsObject.countryName = 'US' studentDetailsObject.print = function(){    console.log('hello David'); } console.log("studentObject", "", studentDetailsObject);To run the above program, you need to use the following command ... Read More

For this, use JSON.parse() along with JSON.stringify().Example Live Demo Document Click The Button To get the Pretty JSON    function printTheJSONInPrettyFormat() {       var badJSON = document.getElementById('prettyJSONFormat').value;       var parseJSON = JSON.parse(badJSON);       ... Read More

Let’s say the following is our radio button group −    Gender:    Male    Female To check a radio in radio group, you need to set checked property to true in JavaScript. Following is the code −Example Live Demo Document ... Read More

For this, you can use the concept of modular operator along with divide. Following is the code −Examplevar divideInteger = function(value, divide) {    var num;    var modular = value % divide;    if(modular == 0){       num = value/divide;       sumOfDivideParts = Array(divide).fill(num);   ... Read More

Let’s say the following is our object −var lastName ={    "John":"Smith",    "David":"Miller",    "Bob":"Taylor" }Following is our array −var firstName=[    "Bob",    "John",    "David" ]Display resultant array based on the object’s order determined by the first array, use map(). Following is the code −Examplevar firstName=[   ... Read More

To make first letter of a string uppercase, use toUpperCase() in JavaScript. With that, we will use charAt(0) since we need to only capitalize the 1st letter.Examplefunction replaceWithTheCapitalLetter(values){    return values.charAt(0).toUpperCase() + values.slice(1); } var word="javascript" console.log(replaceWithTheCapitalLetter(word));To run the above program, you need to use the following command −node fileName.js.Here, ... Read More