var arr=new Array(10,110,34,60,52,65,18,66); var flag=0; for (var i = 0; i < arr.length; i++) { if(arr[i]==66){ console.log(i); flag=1; break; } } if(flag==0){ console.log("66不在该数组中"); }
js 判断一个数是否在数组中
原文：https://www.cnblogs.com/sea-stream/p/11586692.html
