JavaScript is a case sensitive scripting language

Is JavaScript Case Sensitive?

JavaScript is a scripting language used for making dynamic web pages. It is an interpreted artificial language that is integrated with hypertext markup language. It is sensitive to the capitalization of letters.

Identifiers in JavaScript must start with a letter, a digit, an underscore, or a dollar sign. They cannot be numbers.

Variables

Variable names in javascript are case sensitive, meaning that upper and lowercase letters are treated differently. Therefore, it is important to use the correct spelling of variable names. For example, if you are using the variable name totalCost, you must refer to it as totalCost or else it will not work correctly.

Similarly, the names of variables, functions, and keywords are case sensitive in javascript. For example, if you have a function called myFunction and another called MyFunction, the two functions will not work properly. Also, if you have a variable named time and another called Time, the two variables will not be the same.

Typically, variable names in javascript are written in camelCase, where the first letter is lowercase and the first letter of every subsequent word is capitalized. This is a coding convention that helps developers read code more easily. However, the names of constant variables that are declared with the const or let keywords must be in all uppercase.

Functions

A function is a block of code that takes in input and produces an output. Functions are great for efficiency, because they allow you to write a chunk of code once and use it multiple times. This saves time and effort, as you don’t have to rewrite the same code over and over again.

When naming functions, it’s important to remember that they’re case sensitive. It’s also best to use descriptive names so that other developers can understand them. It’s recommended to use a verb as the first character in a function name, and try to limit it to two characters.

String comparison is also case-sensitive. To make sure that you’re comparing strings in the same way, you can use the str.toLowerCase() and str.toUpperCase() functions to convert them to lower and upper case respectively. This can help you prevent syntax and other errors when comparing strings. It’s also useful if you’re working with internationalization.

Keywords

For a scripting language, it’s best to have case sensitivity. This makes it easy for programmers to read and understand code. It also prevents cases of ambiguity, such as when different words have the same meaning.

This is especially important for identifiers, keywords, and function names, which must be capitalised consistently. This is because the identifiers are used to identify objects in JavaScript. The first letter of a identifier must be a letter, underscore (_), or dollar sign ($). However, the remainder of the identifier can be letters, digits, or underscores.

On the other hand, non-programmers may find it confusing if a language is case sensitive. This is because the spelling of English words varies depending on their context. For instance, “may” is a month, while “sat” is an exam. This may make the user think that the search is not working properly. This is why most languages are not case sensitive. Also, case insensitivity can cause problems with tools that programmers use, such as source control and editing programs.

Comments

Like any other programming or scripting language, JavaScript is case sensitive. This means that it requires keywords, variables, function names, and other identifiers to be typed with the same capitalization of letters. This ensures that the same words are always understood, and it also helps prevent errors caused by mixed letter sizes.

In contrast, HTML is a markup language that doesn’t require case sensitivity. This is because tags and attributes are converted to lowercase during rendering. As a result, they can be entered with either upper or lowercase characters, depending on the system used.

The language of javascript allows comments to be included in the code. This makes it easier to understand the code and fix bugs. Any code written after slashes // or in between /* and */ is considered a comment and will not be executed by the browser. Commenting is a common practice amongst programmers and is an important part of the javascript language.

Click to get more information