Problem 579. Spiral In

Created by Nicholas Howe

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Create an m by n matrix filled with sequential integers starting from 1 and arranged in a counterclockwise spiral that hugs the outside border and begins in the upper left corner.

For example:

>> spiralIn(4,5)
ans =
   1    14    13    12    11
   2    15    20    19    10
   3    16    17    18     9
   4     5     6     7     8

Solve

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Last Solution submitted on Jan 23, 2026

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Richard Zapor on 11 May 2012

Tag "Recursion" would help in problem type classification

Ned Gulley on 11 May 2012

Richard, you can add tags whenever you want. Just click on "Add Tags".

Nicholas Howe on 17 May 2012

Good suggestion, although not all solutions proposed have been recursive. Thanks!

henry Liu on 20 Jan 2023

With the process of your coding, you'll find out more and more bugs. This is why I enjoy this problem.

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Problem 579. Spiral In

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Problem 579. Spiral In

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Last 200 Solutions

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Problem Recent Solvers121

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