- Lab 1 - Macro Control (Instructions):
  - Using a text editor, create a new file named `contlab1.mm` in the `mcr` area of the TRAIN option tree (this is the option tree you created in Lab 2 - Option Trees).
  - Your macro will take in one parameter `TAB=` which will be a table.
  - Inside the body of the macro will be three loops:
    Loop 1:
      Create a counting loop that counts by-threes from -9 to 9.
      Inside this loop you will need to add a conditional that has three blocks in it (`IF`, `ELSEIF`, and `ELSE`).
      Your conditional should check to see if the current count is zero, even or odd and should print out a message telling the current count and whether it is zero, odd or even.
      Hint: Before the `IF` you can use `CALCULATOR` to compute `x = (count mod 2)`; by doing this you will know if the count is even (x=0).
    Loop 2:
      This loop is more complicated than the first loop and will require a little bit of code before the loop to set things up.
      In this loop you will be asked to convert between nautical miles (nmi) and kilometers (km). So the first thing you need to do is set up the conversion factor (`NM2KM`).
      - NeXtMidas already has the conversion from nautical miles to meters in its set of constants. You will need to use `INVOKE` to get the value of `nxm.sys.inc.Constants.NM2METERS`.
      - Once you have the value of `NM2METERS` you can use calculator to convert this to `NM2KM` (if you remember back to high school, you will recall that there are 1000 meters in a kilometer, so this is just a simple division using `CALCULATOR`).
      Starting with 0nmi you will need to print out the conversion of nautical miles (nmi) to kilometers (km) for all integer values of nmi where km is less than ten.
      Hint: You can initially start with 0nmi=0km.
    Loop 3:
      This is an easy loop.
      Just loop through the keys in the table that was passed in and print out the key and the value it corresponds with.
  - When you are done use `UPDATE` to add your macro to the dictionary and try it out. The output should look similar to this:

        nM> contlab1 {A=1,B=2,C=3}
        Count is -9 (odd)
        Count is -6 (even)
        Count is -3 (odd)
        Count is 0 (zero)
        Count is 3 (odd)
        Count is 6 (even)
        Count is 9 (odd)
        0nmi = 0.0km
        1nmi = 1.852km
        2nmi = 3.704km
        3nmi = 5.556km
        4nmi = 7.408km
        5nmi = 9.26km
        KEY=A VALUE=1
        KEY=B VALUE=2
        KEY=C VALUE=3