The temperature of a certain day in a certain place in the first month is "-1 degree to 6 degrees", what is the temperature difference in a certain place on this day.
某地元月份某天的气温为"-1度～6度"，这一天某地的温差是多少度．
<gadget id="calculator">6 - (-1)</gadget>
<output>7</output>

<result>7</result>