Question

What will be the result of the following code execution?


var obj = new Object();
alert(obj.a);
obj.a = 5;
alert(obj.a);

Cosmo · Accepted Answer

The code will run without errors. The first alert will print out a message "undefined", and the second - "5".

Cosmo · Accepted Answer

Code will print out "undefined" first, and then "5".

Cosmo · Answer

An error during the script execution.

Cosmo · Answer

Code will print out "null" first, and then "5".

Cosmo · Answer

Code will print out "NaN" first, and then "5".

Cosmo · Answer

Code will print out empty row first, and then "5".