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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
In this tutorial, we will learn about the different methods or ways of finding the largest number contained inside a JavaScript array. An array is a collection of different values. We will define an array of numbers in which we will search for the largest number. There are three ways of finding the largest number in a JavaScript array that is listed below − Traversing the Whole Array Using the reduce() Method Using the Math.max() and apply() methods Traversing the Whole Array This is the easiest or the most naive approach to find the largest number in the ... Read More
In this tutorial, we will learn how we can find the id of the form element to which a button belongs using JavaScript. In HTML, we can use button tag in two ways with form tag, where it can be used to perform some activity in the form when it is clicked, as listed below − Button is inside the FORM tag Button is outside the FORM tag No matter where the button is located, whether it is inside or outside, we can find the ID of the form tag to which the button belongs using JavaScript. Let ... Read More
In this tutorial, we will learn how we can get the coordinates of the mouse cursor relative to the screen with JavaScript. We will find the position of the cursor vertically (Y-axis) and Horizontally (X-axis) relative to the screen. JavaScript allows us to use two different properties to get the coordinates of the mouse cursor relative to the screen when the mouse button is pressed anywhere on the screen − Using the event.screenX Property Using the event.screenY Property Let us discuss both of them one by one with code examples. Using the event.screenX Property The event.screenX property is ... Read More