Question

How to display the lower triangular matrix in JavaScript

Answer 1

function printLowerTriangular(matrix) {
    const rows = matrix.length;
	const cols = matrix[0].length;

	for (let i = 0; i < rows; i++) {
    	let s = "";
        for (let j = 0; j < cols; j++) {
            if (i < j) {
				s += "0" + " "
            }
            else {
				s += matrix[i][j] + " ";
            }
        }
        console.log(s);
    }
}

     
const matrix = [ [1, 2, 3],
                 [4, 5, 6],
                 [7, 8, 9] ];
         
printLowerTriangular(matrix);

  
    
    
/*
run:
    
"1 0 0 "
"4 5 0 "
"7 8 9 "
    
*/

  

 

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