Multiplication Table in node.js

multiplication-table.js

var util = require('util'),
    sprintf = require('sprintf').sprintf, // npm install sprintf
    rows = 10

for(var i=1;i<=rows;i++) {
    for(var j=1;j<=rows;j++) {
        var num = sprintf('%3d', i * j)
        process.stdout.write(num + " ")
    }   
    process.stdout.write("\n")
}