javascript中如何在字符串的两头加上一些字符

Question

javascript中如何在字符串的两头加上一些字符

Answer 1

var str='aaaaaaa';var newstr='';for(i=0;i<str.length;i++){if(i==0){newstr='@'+str[i];}else if(i==str.length-1){newstr=newstr+str[i]+'@';}else{newstr=newstr+str[i];}}