add last 3 to front and back

by Pritesh Patel

JavaScript

function newStr(str){
	if (str.length<3){
	return str+"</br>";
}
var mdStr = str.substring((str.length - 3) , (str.length));
return(mdStr + str + mdStr+"</br>");

}

document.write(newStr("a"));
document.write(newStr("abc"));
document.write(newStr("abcd"));