Why Aren’t ◎ܫ◎ and ☺ Valid Javascript Variable Names?

Why aren’t ◎ܫ◎ and ☺ valid JavaScript variable names?

When working with JavaScript, it is important to understand the rules and limitations surrounding variable names. While JavaScript allows for a wide range of characters to be used in variable names, there are certain characters that are not valid and cannot be used. Two examples of such characters are ◎ܫ◎ and ☺.

JavaScript variable names must adhere to the following rules:

• Must start with a letter, underscore (_), or dollar sign ($).
• Can contain letters, numbers, underscores, or dollar signs.
• Cannot contain spaces or special characters.

The characters ◎ܫ◎ and ☺ do not meet these requirements, which is why they are not valid JavaScript variable names. Let’s take a look at some examples to understand this better.

Example 1: Using ◎ܫ◎ as a variable name

var ◎ܫ◎ = "Hello, World!";

This code will result in a syntax error because the variable name ◎ܫ◎ contains a special character that is not allowed. To fix this, you can choose a valid variable name like helloWorld:

var helloWorld = "Hello, World!";

Example 2: Using ☺ as a variable name

var ☺ = "Smiley face!";

Similar to the previous example, this code will also result in a syntax error because the variable name ☺ contains a special character. To make it a valid variable name, you can use something like smileyFace:

var smileyFace = "Smiley face!";

It is important to choose meaningful and descriptive variable names to improve code readability and maintainability. While JavaScript allows for a wide range of characters to be used in variable names, it is best to stick to letters, numbers, underscores, and dollar signs to ensure compatibility and avoid any potential issues.

Remember, following the rules and conventions of JavaScript variable naming will help you write clean and error-free code.