Question

How to check if a matrix is symmetric (square matrix that is equal to its transpose) in JavaScript

Answer 1

function checkSymmetric(matrix) {
   let rows = matrix.length;
   let cols = matrix[0].length;  

   if (rows != cols) {
      return false;
   }  
   
   for (let i = 0; i < rows; i++) {
        for (let j = 0; j < cols; j++) {
            if (matrix[i][j] != matrix[j][i]) {
                return false;
            }
        }
    }
   
   return true;
}


const matrix = [[1, 2, 3],
	            [2, 3, 7],
	            [3, 7, 4]];

if (checkSymmetric(matrix)) {
   console.log("yes")
}
else{
   console.log("no")
}
 
 

 
/*
run:
 
"yes"
 
*/

 

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