Question

How to add 2 matrices in JavaScript

Answer 1

const a = [
 [1, 0, 2],
 [3, 5, 6],
 [7, 4, 1]
];
const b = [
 [1, 0, 1],
 [2, 2, 1],
 [1, 3, 1]
];
const sum = [
 [0, 0, 0],
 [0, 0, 0],
 [0, 0, 0],
];
 
const rows = a.length;
const cols = a[0].length;
 
for (let i = 0; i < rows; i++) {
    for (let j = 0; j < cols; j++) {
		sum[i][j] = a[i][j] + b[i][j];
    }
}
 
let s = "";
for (let i = 0; i < rows; i++) {
    for (let j = 0; j < cols; j++) {
		s += sum[i][j] + " ";
    }
	console.log(s);
	s = "";
}
 
 
 
   
     
 
/*
run:
     
"2 0 3 "
"5 7 7 "
"8 7 2 "
     
*/

 

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