// You can create a constant array: const cars = ["Saab", "Volvo", "BMW"]; // You can change an element: cars[0] = "Toyota"; // You can add an element: cars.push("Audi");

Mar 19, 2025 · The const declaration declares block-scoped local variables. The value of a constant can't be changed through reassignment using the assignment operator, but if a constant is an object, its properties can be added, updated, or removed.

Feb 12, 2025 · It is used to declare variables whose values need to remain constant throughout the lifetime of the application. const is block-scoped, similar to let, and is useful for ensuring immutability in your code. Unlike let, the primary feature of const is that it cannot be reassigned once it has been initialized. Syntax.

JavaScript Constants. A constant is a type of variable whose value cannot be changed. In JavaScript, we use the const keyword to create constants. For example, // assign 5 to num const num = 5; Once a constant is initialized, we cannot change its value.

ES6 provides a new way of declaring a constant by using the const keyword. The const keyword creates a read-only reference to a value. By convention, the constant identifiers are in uppercase. Like the let keyword, the const keyword declares blocked-scope variables.

Creating a variable in JavaScript is called "declaring" a variable: A const variable must be assigned when it is declared. Required. The name of the variable. Required. A value to be assigned to the variable. When to use JavaScript const? As a general rule, always declare a variable with const unless you know that the value will change.

JavaScript ES6 has introduced the const keyword to work with constants. const denotes that the reference to value is constant and cannot be changed. For example,

Apr 15, 2023 · These JavaScript Constants are read-only and declared with const keyword, which gets assigned at the time of declaration. Constants can be either global or local to function where it’s being declared.

Go supports constants of character, string, boolean, and numeric values. A const statement can appear anywhere a var statement can. Constant expressions perform arithmetic with arbitrary precision. A numeric constant has no type until it’s given one, such as by an explicit conversion.