# Semicolons, white space and sensitivity ### Semicolons Every statement in a JavaScript program is optionally terminated using semicolons. I said optionally, because the JavaScript interpreter is smart enough to introduce semicolons for you. In most cases, you can omit semicolons altogether from your programs. This fact is very controversial, and you’ll always find code that uses semicolons and code that does not. My personal preference is to always avoid semicolons unless strictly necessary. ### White space JavaScript does not consider white space meaningful. Spaces and line breaks can be added in any fashion you might like, even though this is *in theory*. In practice, you will most likely keep a well defined style and adhere to what people commonly use. For example, I like to always use 2 characters to indent. ### Case sensitivity JavaScript is case sensitive. A variable named `something` is different from `Something`. A variable named `AGE` is different from `age` and from ‘aGe’. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.bashschool.in/v1/javascript/basics/semicolons-white-space-and-sensitivity.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.