/ var i=arr.length; while(i>0){ alert(Hello,${arr[i-1]}!); i--; } /
Hello,${arr[i-1]}!
/ var i=1; while(i<=arr.length){ alert(Hello,${arr[i-1]}!); i++; } /
/ for(var i=1;i<=arr.length;i++){ alert(Hello,${arr[i-1]}!); } /
for(var i=arr.length;i>0;i--){ alert(Hello,${arr[i-1]}!); }
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w_玉芳
/ var i=arr.length; while(i>0){ alert(
Hello,${arr[i-1]}!); i--; } // var i=1; while(i<=arr.length){ alert(
Hello,${arr[i-1]}!); i++; } // for(var i=1;i<=arr.length;i++){ alert(
Hello,${arr[i-1]}!); } /for(var i=arr.length;i>0;i--){ alert(
Hello,${arr[i-1]}!); }