1indexed

1indexed refers to a convention in some programming languages and mathematical contexts where the first element of a sequence, array, or list is assigned the index 1, rather than the more common index 0. This contrasts with 0-indexed systems, which are prevalent in many popular programming languages such as C, Java, Python, and JavaScript.

In a 1-indexed system, the first item is accessed using the index 1, the second item with index 2, and so on. This can sometimes be perceived as more intuitive by individuals coming from a non-computational background or those accustomed to mathematical notation where sequences are often depicted starting from 1.

Languages that utilize 1-indexing include Lua, MATLAB, and R. This choice can influence how programmers approach array manipulation and loop construction. For example, iterating through a 1-indexed array of length n would typically involve a loop from 1 to n, whereas a 0-indexed array of the same length would be iterated from 0 to n-1.

The choice between 0-indexing and 1-indexing is largely a design decision within a language or system. Both have their advantages and disadvantages depending on the context and the intended use case. Understanding the indexing convention of a particular language or tool is crucial for correct programming and data manipulation.