Exercise/9.htm at master · KalariaYash/Exercise · GitHub

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<!-- Write a JavaScript program to check whether a matrix is a diagonal matrix or not. In linear algebra, a diagonal matrix is a matrix in which the entries outside the main diagonal are all zero (the diagonal from the upper left to the lower right). -->
<!DOCTYPE html>
<html>

  <head> </head>

  <body>
    <script>
    let array = new Array();
    let i = 0;
    let j = 0;
    let flag = false;
    let n = +prompt( "Enter the n for n*n matrix")
    for ( i = 0; i< n*n; i++) {
        array[i] = +prompt( "Enter n*n matrix elements row wise", 0 );
    }
    for(i = 0; i < n; i++) {
        for(j = 0; j < n, j++;) {
            if( i==j ) {
                continue;
            }
            if ( array[j + i*n] == 0 ) {
                flag = true;
                break;
            }
            else {
              flag = false;
            }
        }
        if ( flag == false ) {
            break;
        }
    }
    if ( flag == true ) {
        alert ( "Given matrix is diagonal matrix" ) ;
    }
    else {
        alert ( "Given matrix is not diagonal matrix" ) ;
    }

    </script>
  </body>

</html>