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JavaScript object properties are the keys inside the body of a JavaScript object. Object properties can be any of the three primitive data types, or any of the abstract data types, such as another object. Object properties are usually variables used internally in the object's methods, but can also be globally visible variables that are used throughout the page. These properties can either be statically typed by the programmer at the time of object declaration, or they can be modified or created later according to the need. There are two ways of creating or adding properties to a JavaScript object ... Read More
In this tutorial, we will learn how to get the square root of a number in JavaScript in both ways. The square root of a number in JavaScript can be found in two ways − Using Math.sqrt() Method By creating a Custom Function The square root of a number is a factor that, when multiplied by itself, gives the original number. For example, 10 is the square root of 100 because if you multiply 10 by itself (10*10), the result will be 100. Using the Math.sqrt() Method In JavaScript, The Math.sqrt() method is useful for finding the square ... Read More
This tutorial will help you to find the arcsine in radians of a number in JavaScript. Sine is the ratio of the opposite side and hypotenuse of the right triangle they define. To get the sine of a number, the Math.sin() function is used in JavaScript. It returns a value between 1 and -1. This represents the sine of an angle. This will be in radians. The inverse of sine is called Arc sine. An angle's trigonometric Arc sine value can be calculated using asin() method. This returns a value between -π/2 and π/2. The input to asin() method is ... Read More
This tutorial will help you to find the arccosine in radians of a number in JavaScript. Cosine is the ratio of the adjacent side and the hypotenuse of the right-angled triangle which is defined by them. To get the cosine of a number, the Math.cos() function is used in JavaScript. The value returned will be between -1 and 1. This denotes the cosine of an angle. This will be in radians. The inverse of cosine is called Arc cosine. An angle's trigonometric Arc cosine value can be calculated using acos() method. This returns a value between 0.0 and pi. The ... Read More
In this tutorial, we will discuss different approaches to find the text visible on the button with JavaScript. The text on a button shows what will happen if you click the button. To extract the text on the button, JavaScript provides us with the following two properties. Using the innerHTML Property Using the innerText Property Let us discuss both of the above properties in detail. Using the innerHTML Property The innerHTML property not only allows us to get the text inside any tag but also allows us to set the text to any tag. This property also allows ... Read More
In this tutorial, we will learn how to find the number of anchors used in an HTML document with JavaScript. Sometimes, During the development of a web page, the developer may need to add multiple links to the different buttons present on the webpage using multiple anchors for each button. In such a situation, if you want to find the number of anchor elements, you can use the anchors property. JavaScript allows us to use the anchors property to count the number of anchors ( elements) in an HTML document. Note − The document.anchors property is deprecated and no longer ... Read More
In this tutorial, we will learn how to find the name of the first form in an HTML document. Sometimes, we use more than one form tags in the HTML document for different purposes. At that time, we can face difficulties in finding the specific element to add some more properties to it. In such conditions, we can use the forms property of the "document" interface to access all the elements present in the document individually as well as collectively Document.forms As we discussed above, the forms property is used to access all the forms present in the ... Read More
The space on the number line between any integer and zero is known as its absolute value. No negative values exist because it is the distance. This tutorial will help you find a number's absolute value in JavaScript. Next, we will see the method to find the absolute value of a number in JavaScript. Using Math.abs() A number's absolute value is returned using the Math.abs() function. If n is positive or zero, it returns n, and if n is negative, it returns the negation of n. The Math.abs() is a static function of Math. Hence, we use it as it ... Read More
In this tutorial, we will learn different ways of finding the maximum and minimum elements of an array in JavaScript. The minimum element is the smallest element among all the elements present in the array, while the maximum is the largest among them Below are the approaches we can use to find the min/max elements of an array. Traverse the whole Array Using the Math.min() and Math.max() Methods. Let us discuss these approaches with help of program examples. Approach 1: Traverse the whole Array In this approach, we will traverse the whole array using the for loop and ... Read More
In this tutorial, we will learn about the method of finding the length of an array in JavaScript. The length of an array is the number of elements or items contained by a JavaScript array. In JavaScript, we have only one way or method to find out the length of an array. Using the length property Using the length property In JavaScript, we are allowed to use the length property of JavaScript for finding the length of an array. As we know the length of an array is the number of elements contained by the array, the length ... Read More