1. )
    String, Boolean, Numbers and Float

2. )
    `Math.sqrt(9);`

3. )
    `Math.round(2.5);`

4.)
    `x = "hello", y = x.charAt (3,4) = "lo"` : Choosing a specific value range on string.
    `x = "hello", y = y.startswith ("h") = true` : Choose if a string starts with a specific value.

    `x = [h,e,l,l,o], x.push ("l") = x = [h,e,l,l,o,l]` : adding value to end of array.
    `x = [h,e,l,l,o], y=x.join ["hello"]`: joining all values in an Array to form a string.

5. )
  undefined is when the datatype has not been fixed. null is the default for datatypes.
  Bonus

JS Part II
1.)
  `x.shift()`

2.)
  'x.pop()'
Assume array x contains an odd number of elements (i.e. its length is an odd number). Write an expression that returns the MIDDLE element of the array.

//example
var x = [8,4,3,9,0,1,4];
//the expression you write will return 9 in this case
3.)
    ```
    var x = [8,4,3,9,0,1,4];
    var middle = x[Math.floor((x.length - 1) / 2)];
    console.log(middle);
    ```
4. )
    While will execute code as long as test is true. Do-while will do the same after executing the code once.


5. )
  ```
    var array = "h,e,l,l,o, ,w,o,r,l,d".split(',');
    var i = 0;
    while (i < array.length) {
      i += i;
    var t = array[i-1];
    array[i-1] = array[i];
    array[i] = t;
        }
  ```