What's a[[-1]] of a table a?

Question

Suppose I have a normal table $a$, what does $a[[-1]]$ mean, which element of the table?

The last one; see the docs of Part. – corey979 Dec 22 '16 at 01:35 — corey979, Dec 22 '16 at 01:35
Here is an answer of interest. – J. M.'s missing motivation Dec 22 '16 at 01:38 — J. M.'s missing motivation, Dec 22 '16 at 01:38

score 1 · Answer 1 · answered Dec 22 '16 at 01:40

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a[[-1]] means the last element of table a. actually, the negative index means the order from the back,such as{a,b,c,d}[[-2]] is c, it helps to manipulate list more efficiently.

answered Dec 22 '16 at 01:40

Oliver Redman

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What's a[[-1]] of a table a?

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