Problem 45830. Make a checkerboard matrix (★★★★★)

Anirban Pal

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(copy of Prob. 4)
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1.
Example:
 Input  n = 5
 Output a is [1 0 1 0 1
              0 1 0 1 0
              1 0 1 0 1
              0 1 0 1 0 
              1 0 1 0 1]
Avoid using for/while loops.

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Last Solution submitted on Mar 31, 2026

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