how to round up javascript code example

Example 1: javascript ceiling

var ceiling1 = Math.ceil(4.7); //5 
var ceiling2 = Math.ceil(-3.4); //-3

Example 2: round up javascript

Math.round(3.14159)  // 3
Math.round(3.5)      // 4
Math.floor(3.8)      // 3
Math.ceil(3.2)       // 4