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    "# Exercise \n",
    "\n",
    "If you're up for it, test your understanding of what we discussed about control flow in SAS to write a `%macro` that takes a `start_year`, an `end_year`, and a macro `name` and calls the specified macro for each year inbetween `start_year` and `end_year`. \n",
    "\n",
    "````{admonition} Solution\n",
    ":class: dropdown, success\n",
    "\n",
    "``` sas\n",
    "    %macro exercise(start_year, end_year, name);\n",
    "        \n",
    "        %do year = &start_year %to &end_year;\n",
    "            %&name.(&year.);\n",
    "        %end;\n",
    "        \n",
    "    %mend exercise;\n",
    "```\n",
    "````"
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