What will be the output of the following JavaScript code?
int sum=0;
var arr = [10,15,20,30];
arr.forEach(function myFunction(element)
{
sum= sum+element;
});
document.writeln(sum);
a) 70
b) 75
c) 10
d) error

Answer: b
Explanation: forEach is a predefined function in Javascript which used to traverse through the array. It works in a similar way to for loop and iterates through each value in array.