// Get The Length Of The String.
function strLength(x){
var counter = 0;
while(x[counter] !== undefined){
counter++;
}
return counter;
}
var str = prompt("Write your string ...",''); // Get String From User.
var The_Length = strLength(str); //
var lastChar = counter - 1; // The Index Of Last Letter.
console.log(`The Length Of Your String is ${counter}`);
console.log(`The Last Char In Your String Is ${str[lastChar]}`);