# VisibleList _ ZZ -- get element from list

## Synopsis

• Operator: _
• Usage:
x_i
• Inputs:
• Outputs:
• the i-th element of the list x

## Description

The entries of the list, sequence or array are numbered starting with 0. If i is negative, then the i-th entry counting from the end is provided. If i is out of range, an error is signaled.

 i1 : x = a..t o1 = (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t) o1 : Sequence i2 : #x o2 = 20 i3 : x_-1, x_19, x_0 o3 = (t, t, a) o3 : Sequence

## Caveat

Lists are immutable objects, i.e. you cannot assign to them. See MutableList for lists that you may modify.