javascript - How to get math.random to work? -


i wrote code math.random make random number between 1 3 when press click me button, give +3 doesn't random between 1 3.

i want give between 1 3 when click button.

live demo

var cookies = 0;  var rand = math.floor(math.random() * (3 - 1 + 1)) + 1;  if(localstorage.cookies)   cookies = localstorage.getitem('cookies');     document.getelementbyid("cookies").innerhtml = cookies;  function cookieclick(number) {   cookies = parseint(cookies) + rand;   document.getelementbyid("cookies").innerhtml = cookies;   localstorage.setitem('cookies', cookies);  }

generate random number each time button clicked, not @ top of script. also, why subtracting 1 3 adding right back?:

function cookieclick(number){   var rand = math.floor(math.random() * 3) + 1;   cookies = parseint(cookies) + rand;   document.getelementbyid("cookies").innerhtml = cookies;   localstorage.setitem('cookies', cookies); }

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