positionEnd

positionEnd refers to the final index of a substring or segment within a larger string or data structure. It signifies the boundary marking the conclusion of the identified portion. In programming contexts, this is often a zero-based index, meaning the character or element at positionEnd is not included in the segment. For example, in a string "hello world", if we consider the substring "hello", its positionEnd would typically be 5, as the characters are at indices 0, 1, 2, 3, and 4.

The concept of positionEnd is crucial for operations such as slicing, substring extraction, and range-based access. It helps define the extent of a data segment and is frequently used in conjunction with a corresponding positionStart value, which indicates the beginning of the segment. Understanding whether positionEnd is inclusive or exclusive of the element it points to is vital for accurate data manipulation and avoiding off-by-one errors. Different programming languages and libraries may have slightly varied conventions regarding the inclusivity of positionEnd.