In the above example, we grabbed the value entered by the user and then convert it to the number using the Number method, which will convert the input value to the number data type if the entered value is an integer. Otherwise, it will convert it into NaN and then check for it inside...
An enumeration consists of a set of named integer constants. ... A variable of the enumeration typestores one of the values of the enumeration set defined by that type. Variables of enum type can be used in indexing expressions and as operands of all arithmetic and relational operators. Why ...
If we try to make a number from a non-numeric string, JavaScript will not throw an exception. Instead, it will return NaN. It is, well, understandable. But JavaScript is one of the few languages that returns NaN in such a common operation. E.g. Python throws an exception: Copy int("...
What does "object destructuring" mean and what is the result of a destructuring operation?Say you have an object with some properties:const person = { firstName: 'Tom', lastName: 'Cruise', actor: true, age: 57 }You can extract just some of the object properties and put them into ...
Rectangle r2(4, 5); // Uses constructor with two integer parameters In addition to overloading constructors with different parameters, we can overload constructors with default parameter values, as well. For example: class Circle {private:double radius;public:Circle() {radius = 1.0;}Circle(do...
Using JavaScript's var keyword to declare variables Because it is permissible for a variable named greeting that is created as a text string type String to change on the fly to a variable of type integer, JavaScript is known as a weakly typed language. In a strongly typed language like C++...
This is because JavaScript supports the following data types:String ‒ consists of textual data written inside quotes. For example, “Hello world”, ‘Hello world’, and “Display ‘Hello world’ text”. Number ‒ covers integer and floating-point numbers between (2^53 – 1) and -(2^...
These operations are called bitwise because they compare the converted operands bit by bit, then return a 32-bit binary result converted into an integer. Example:var variable_1 = 20; var variable_2 = 50; console.log(variable_1 | variable_2) // display the result of variable_1 OR ...
For the last several years, JavaScript has been evolving on a steady cadence with new language features. If you’re curious to see what’s in store for the next version of JavaScript, this post is for you! Before we talk about the latest features, it’s important to understand how new ...
For example, a developer could assign the variable “a” the value of 100. The compiler will infer at runtime that “a” represents an integer. However, this also means variable types could be misinterpreted as they are run. This can cause bugs and errors. ...