Span 
i;;j
represents a span of elements i through j.
i;;
represents a span from i to the end.
;;j
represents a span from the beginning to j.
;;
represents a span that includes all elements.
i;;j;;k
represents a span from i through j in steps of k.
i;;;;k
represents a span from i to the end in steps of k.
;;j;;k
represents a span from the beginning to j in steps of k.
;;;;k
represents a span from the beginning to the end in steps of k.
Details

- m[[i;;j;;k]] is equivalent to Take[m,{i,j,k}].
- m[[i;;j]]=v can be used to reset a span of elements in a list or other expression.
- When used in Part, negative i and j count from the end.
- In i;;j, i;;j;;k, etc., i and j can be of the form UpTo[n].
- Any argument of Span[…] can be All, in which case it is interpreted as returning the largest possible number of elements consistent with any possible value of that argument.
Examples
open allclose allBasic Examples (3)
Scope (7)
Properties & Relations (4)
See Also
Related Guides
Introduced in 2007
(6.0)
| Updated in 2017 (11.2)