Which character is used as the escape character in JavaScript?

In JavaScript, the escape character is the backslash (). This special character is used to indicate that the character following it should be treated differently from its usual interpretation. For instance, if you want to include a quotation mark within a string that is enclosed in quotation marks, you would use the backslash to escape that quotation mark. This way, JavaScript knows not to end the string at that point.

For example, the string "She said, "Hello"." uses the backslash to escape the quotation marks. Without the escape character, JavaScript would misinterpret the string, potentially leading to errors in your code.

The other options do not serve as escape characters in JavaScript. The hash symbol (#) and percent sign (%) have different uses in the context of JavaScript, such as representing comments or indicating URL encoding, respectively. The forward slash (/) is commonly used in comments or to denote division in mathematical expressions, but it does not function as an escape character. Thus, the backslash is the fundamental character for escaping in JavaScript.