in Matlab code

ismagic

A magic square is defined as a square matrix with n rows, containing numbers from $1$ to n$^2,$ and whose rows and columns sum up to the same number. Write a function ismagic $($M$)$ that takes a matrix M as input and returns true only if M is a magic square. Hints: sort, sum, unique, all.

$>>$ ismagic$([816$; $357$; $492])$ ans $=1>>$ ismagic$([22$; $22])$ ans $=0>>$ ismagic$([816$; $357])$ ans $=0$