## Question:

Which means i-th, I'm having trouble understanding its use in *arrays* and arrays.

## Answer:

When you refer to index 0 of an *array* , you can say the first element, right? Just as 1 is second, 2 is third, and so on. The 19 is the twentieth.

How would you talk about the `i`

element of the *array* ? i-th. So when you need to define a "generic" (variable) position of the *array* , you can use this expression to indicate which element will depend on the value of `i`

to know the real position.

-th (from the ending of hundredth or thousandth) composition element

It expresses the notion of ordinal and fractional numerals (ex.: cagagéth, nth, infinitesimal).

"-ésimo", in Priberam Dictionary of the Portuguese Language [online], 2008-2013, https://dicionario.priberam.org/-%C3%A9simo [accessed on 12/03/2019].