In this article, we will learn to create a variable using the user-defined name in JavaScript.
Variables in JavaScript: Basically, it is a container that holds reusable data in JavaScript. The variable’s value can be changed during program execution and should be declared before using it. Before ES6 declares a variable, we just use the var keyword to create a variable, but ES6 and later, two more keywords were added to create a variable namely let and const.
Approach:
In JavaScript, it is possible to create a variable using a user-defined name. First, we will create a variable using an object then, we will create a variable using this keyword.
Example 1: Create a variable using a user-defined name in JavaScript with the help of an object.
Javascript
// A user-defined variable created let my_var = "userVariable"; let my_value = "userValue"; let x = { // Assign value of a user-defined variable [my_var]: my_value, }; console.log(x); console.log(x[my_var]); |
Output:
Example 2: Create a variable using a user-defined name in JavaScript with the help of this keyword.
Javascript
let var_name = "newVariable"; let var_value = "newValue"; this[var_name] = var_value; console.log(var_name); console.log(this[var_name]); |
Output:
newVariable newValue
Conclusion: In this article, we learned to create a variable using the user-defined name in JavaScript with the help of two suitable approaches.
