If/else statement Lua

Each time the arithmetic question is generated and whenever i pick the right or wrong answer the statement of function checkanswer() always goes on if-statement "Correct". How am i able to create if/else statement correctly base on an arithmetic question varanswer = var1 + var2

 function checkAnswer(event)

if(#theAnswer == questionGen()) then
        instructionsText.text = "Correct!";
        instructionsText:toFront()
        generateBalls()
        for i=1, allBallsGroup.numChildren do
            display.remove(allBallsGroup[1])
        end
    else
        instructionsText.text = "Incorrect!";
        instructionsText:toFront()
        generateBalls()
        for i=1, allBallsGroup.numChildren do
            display.remove(allBallsGroup[1])
        end
    end
end


function questionGen()

 local questionVar1 = display.newImage("ygSquare.png", 150, 500); 
 local var1 = math.random(1,9)
 local var1Display =display.newText(var1, 200, 500, native.systemFont, 200)
 questionVar1.width = 200
 questionVar1.height = 200
 questionVar1.x = 350
 questionVar1.y = 500
 var1Display.x = 350
 var1Display.y = 500
 var1Display:setTextColor("#000000")
 local questionVar2 = display.newImage("blueSquare.png", 150, 500);
 local var2 = math.random(1,9)
 local var2Display = display.newText(var2, 200, 500, native.systemFont, 200)
 questionVar2.width = 200
 questionVar2.height = 200
 questionVar2.x = 700
 questionVar2.y = 500
 var2Display.x = 700
 var2Display.y = 500
 var2Display:setTextColor("#000000")
 local operator = "         +     " 
 local operatorDisplay = display.newText(operator, 400, 500, native.systemFont, 200)
 operatorDisplay:setTextColor("#000000")
 local varAnswer = var1 + var2
 return varAnswer

end