I have a TypeError: Cannot read property ‘length’ of undefined. What is the problem second for-loop (grades[row].length)? Any suggestion? I use sublime text for editor.
var grades = [[90, 77, 78], [76, 82, 81], [91, 94, 89]];
var total = 0;
var average = 0.0;
for(var row = 0; row < grades.length; row++){
for(var col = 0; col < grades[row].length; col++){
total += grades[row][col];
}
}
average = total / grades[row].length;
console.log("Student " + parseInt(row+1) + " average: " + average.toFixed(1));