# Getting last index of a collection in Julia – lastindex() Methods

• Last Updated : 26 Mar, 2020

The `lastindex()` is an inbuilt function in julia which is used to return the last index of the specified collection. If a dimension d is given, return the last index of collection along dimension d.

Syntax:
lastindex(collection)
or
lastindex(collection, d)

Parameters:

• collection: Specified collection.
• b: Specified dimension.

Returns: It returns the last index of the specified collection. If a dimension d is given, return the last index of collection along dimension d.

Example 1:

 `# Julia program to illustrate ``# the use of lastindex() method``  ` `# Getting the last index of the specified collection.``println(lastindex(``0``))``println(lastindex([``1``, ``2``, ``3``]))``println(lastindex([``2` `4``; ``5` `6``]))``println(lastindex([``3``; ``5``; ``7``; ``9``]))`

Output:

Example 2:

 `# Julia program to illustrate ``# the use of lastindex() method``  ` `# Getting the last index of the specified ``# collection. If a dimension d is given, ``# return the last index of collection ``# along dimension d.``println(lastindex(rand(``1``, ``2``, ``3``, ``4``), ``1``))``println(lastindex(rand(``1``, ``2``, ``3``, ``4``), ``2``))``println(lastindex([``1``, ``2``, ``3``], ``2``))``println(lastindex([``2` `4``; ``6` `8``], ``2``))``println(lastindex([``2``; ``4``; ``6``; ``8``], ``2``))``println(lastindex(cat([``1` `2``; ``3` `4``], [``5` `6``; ``7` `8``], [``2` `2``; ``3` `4``], dims ``=` `3``);))`

Output:

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