摘要: Adding two numbers concatenates them instead of calculating the sum JavaScript里两个变量 var a = 2; var b = 1; var c = "(" + a + b +")"; alert(c); 结果输出:(21 阅读全文
posted @ 2017-04-17 19:06 任国强 阅读(2210) 评论(0) 推荐(0) 编辑