xxxxxxxxxx
function replaceAt(index, word, replacement)
{
let partOne = word.substring(0, index)
let partTwo = word.substring(index, word.length-1);
let answer = partOne + replacement + partTwo;
return answer;
}
var s = new String("AAAAA");
for(var i =0; i<s.length; i++)
{
if(s[i]=="A")
{
s= replaceAt(i, s, "@@@@");
}
}
console.log(s);
/*console.log() @@@@@@@@@@@@@@@@@@@@*/