The sexadecimal number system is a base-16 numeral system that is used primarily in computing and programming. It is also referred to as hexadecimal or simply hex. This system employs 16 unique alphanumeric characters (0-9, A-F) to represent values, making it a convenient way to represent large numbers in a compact and user-friendly format. The sexadecimal number system is commonly used in computer programming languages such as C++, Java, and Python, as well as in digital electronics. While hex is the most common synonym for the sexadecimal system, other synonyms include base-16, sixteen-cipher, and heximal.