in javascript web apps node js

Write an if-else statement that if numDifference is greater than stringDifference, execute totalDifference = -30. Else, execute totalDifference = numDifference.

given

var totalDifference = 0; var numDifference = -18; // Program will be tested with -18, -19 and -20 var stringDifference = "-19";

/* Your solution goes here */