Is JavaScript case sensitive?

JavaScript is indeed case sensitive, which means that it distinguishes between uppercase and lowercase letters in identifiers such as variable names, function names, and object properties. For example, the identifiers "myVariable" and "myvariable" would be treated as different entities entirely. This characteristic is crucial because it affects how code is written and how it functions. If a variable is declared with one casing, trying to access it with a different casing will result in an error, leading developers to be careful about consistency in naming. Understanding this aspect of JavaScript helps programmers avoid bugs stemming from casing mismatches, which is particularly important in a language where identifiers are a fundamental part of the code structure.