Learn how to user console.count in order to log out how many times a given thing has happened.
for(var i = 0; i < 10; i++){ var num = Math.random() * 100; if(num > 50){ console.count("Greater than 50"); }else{ console.count("less than 50"); } }
[Javascript] Using console.count to Count Events
原文：http://www.cnblogs.com/Answer1215/p/5498289.html