How to create a variable using a user-defined name in JavaScript ?
Last Updated :
17 Feb, 2023
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
let my_var = "userVariable" ;
let my_value = "userValue" ;
let x = {
[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.
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