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In this tutorial, we will convert Boolean to Number in JavaScript. The Boolean is the variable's data type, which is supported by JavaScript like the other programming languages. The Boolean data type contains only two values, true and false. In some cases, programmers must convert the true or false value to the number. For example, using the strict equality operator to compare the Boolean value with the number variable. Here, using different operators, we have three methods to convert the Boolean to a number. Using the Number() Function In JavaScript, the Number() function is useful to convert any variable to ... Read More
In this tutorial, we will learn to convert the binary to decimal in JavaScript. The Binary number is used in digital electronics. It is a string of ‘0’ and ‘1’, representing the number with respect to base 2. Here are the different methods below to convert the binary number to decimal. Using the parseInt() Method In JavaScript, parseInt() method is useful to extract the number from the string. We can define the base for the number as a parameter in the parseInt() method. Syntax Users can follow the below syntax to use the parseInt() method to convert the binary to ... Read More
This tutorial will teach us to convert the string into the upper case. In many governments, websites users have seen while filling forms, characters are automatically converted into the upper case to avoid any mistakes. It needs to do because JavaScript is a case-sensitive language, and if the user adds some characters in lower case and some in upper case, it can mismatch with the string stored in the database. To get accurate data from the user, it is needful to convert the string to uppercase. Here, we will learn the different methods to convert the string into the upper ... Read More
This tutorial will teach us to convert the string into the lower case. Programmers can ask themselves why they need to convert the string in the lower case? Let’s understand the answer using the single example. Suppose you are developing the application and need to take input from the user using the form or either way. Users can type the text in upper case, lower case, or a mix of both. Also, you have stored some values in the lower case in your database, and you need to match them with the user input. If you match the input string ... Read More
In this tutorial, we will learn to compare two numbers in JavaScript. If you are a competitive coder or application developer, in these cases, you need to make a comparison between two numbers and need to perform the particular operation basis on the comparison result of the numbers. Still, many programmers think we can compare the number only using the equality operator. Still, we can also compare the numbers using the less than or greater than operators. We will see the use of all three operators to compare the number in this tutorial. Using the Strict Equality Operator (===) In ... Read More
In this tutorial, we will learn to check whether a value is a safe integer or not in JavaScript. The simple definition of the safe integer in JavaScript is all numbers we can represent under the IEEE-754 double-precision number. It is the set of all numbers which lie between the -(2^53) to (2^53) exclusive, and we can represent it in the standard way. Here, we have different approaches to checking whether the number is a safe integer. Using the Number.IsSafeInteger() Method Using the if-else Conditional Statement Using the Number.isSafeInteger() Method In JavaScript, the isSafeInteger() method checks that type ... Read More
In this tutorial, we will learn to check if the variable is a Boolean in JavaScript. In JavaScript, if we match the two different variables with the same value and different data types using the equality operator, it returns a true value. It means if we compare a twovariable with the true value but different data types such as Boolean and string, it will generate a positive result. To overcome these problems, we need to check if the variable is of type Boolean or not before matching it with other values. Users can use the three methods below to check ... Read More
In this tutorial, we will learn to check if the variable is NaN in JavaScript. The full form of the NaN is ‘not a number’. The NaN is the reserved keyword in the JavaScript which we can assign to the variable. If users are using the below method to check whether a variable is a number or not, it will not work. var a = "Hello"; let result = a == NaN; // it always returns false. As we have talked that the above method will not work to check for a number because NaN is the reserved keyword. ... Read More
In this tutorial, we will learn to check if a variable is an integer in JavaScript. Before we solve the problem, we must have a problem. We can ask ourselves, “why do we need to check if the variable is an integer?”. Let’s understand the answer using a single example. Suppose, we are taking the value from the user using the input text box. It returns the values in the string format, and now think that we are adding values. Will we get the correct result? Obviously, not. So, in such cases, we need to check if the variable is ... Read More
In this tutorial, we will learn to check whether the JavaScript function is defined or not. If a programmer calls the JavaScript function without defining it, they will see the reference error with the message like “function is not defined.” To overcome the problem, the programmer can check whether the function is defined and call the function. We will look at the various approaches to check if the function is defined or not in JavaScript below. Using the typeof Operator In JavaScript, the typeof operator is useful to check the type of the variable, function, objects, etc. When we use ... Read More