????：<!DOCTYPE html><html><head><meta charset="UTF-8"><title>javascript變量</title></head><body><script> var num = 1,
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>javascript變量</title>
</head>
<body>
<script>
var num = 1,num2 = 2;
num += num2;
document.write(num);
</script>
</body>
</html>
?? ???：查無(wú)此人?? ??：2019-05-07 09:41:10
???? ??：完成的不錯(cuò)。剛開(kāi)始學(xué)習(xí)js，比較辛苦，因?yàn)閖s有邏輯了，繼續(xù)加油。