Question

How to print matrix rows in a chain pairs (first + second, second + third) with JavaScript

Answer 1

function print_row(matrix, row) {
    const cols = matrix[0].length
    
    let s = "";
    for (let j = 0; j < cols; j++) {
        s += matrix[row][j] + " ";
    }
    console.log(s);
}

  
   
const matrix = [ [ 4,  7,  9, 18, 29], 
                 [ 7,  9, 18, 29,  4], 
                 [ 9, 18, 29,  4,  7], 
                 [18, 29,  4,  7,  9], 
                 [29,  4,  7,  9, 18] ];
  
const rows = matrix.length;


for (let i = 0; i < rows - 1; i++) {
    print_row(matrix, i);
    print_row(matrix, i + 1);
    console.log("-----------");  
}


      
        
        
/*
run:
        
4 7 9 18 29 
7 9 18 29 4 
-----------
7 9 18 29 4 
9 18 29 4 7 
-----------
9 18 29 4 7 
18 29 4 7 9 
-----------
18 29 4 7 9 
29 4 7 9 18 
-----------
        
*/

 

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