Question

How to get the length of the boundaries of a matrix in Java

Answer 1

public class MyClass {
    static int GetBoundariesLength(int matrix[][]) {
        int rows = matrix.length;
        int cols = matrix[0].length;
        
        return (rows * 2) + (cols * 2) - 4;
    }

    public static void main(String args[]) {
        int matrix[][] = { 
	        { 1,  2,  3,  4,  5},
            { 6,  7,  8,  9, 10},
            {11, 12, 13, 14, 15},
            {16, 17, 18, 19, 20} 
	    };

	    System.out.print(GetBoundariesLength(matrix));
    }
}






/*
run:

14
      
*/

 

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