Time for action – setting the score

Who doesn't like some friendly competition? We're familiar with scoreboards from the games we made in the previous chapters. So, we are not strangers to tracking the score. Perform the following steps to set the score:

1. Create a local function called setScore() with a parameter called scoreNum:

       local setScore = function( scoreNum )

2. Set the variables to count the score:

         local newScore = scoreNum
         gameScore = newScore
         if gameScore < 0 then gameScore = 0; end

3. Have the score updated when points are earned in game play and close the function:

         scoreText.text = "Score: " .. gameScore
         scoreText.xScale = 0.5; scoreText.yScale = 0.5
         scoreText.x = (scoreText.contentWidth * 0.5) + 15
         scoreText.y = 15
       end

What just happened?

When setScore(scoreNum) is called within any function, it will refer to all the methods using the gameScore variable. Assuming gameScore = 0 at the start of the application, the value increments to what...