Mathオブジェクト

console.log(Math.PI); // 3.141592653589793
console.log(Math.ceil(5.3)); // 6
console.log(Math.floor(5.3)); // 5
console.log(Math.round(5.3)); // 5
console.log(Math.random()); // 0.6640588690898954

http://dotinstall.com/lessons/basic_javascript_v2/26721



Starships (Glee Cast Version)

Starships (Glee Cast Version)