Object JavaScript two twos

ojs-twotwos.js

var two; 
two = 2; 
three = 3; 
incrementValues(); 
console.log("two after increment = " + two + "\n");
console.log("three after increment = " + three + "\n");

function incrementValues() { 
 var two; 
 two = 2 + 1; 
 three = 3 + 1; 
 console.log("incremented two = " + two + "\n"); 
 console.log("incremented three = " + three + "\n\n");
}