On a certain day in Nandan County, the highest temperature is 10 degrees above zero, and the lowest temperature is 2 degrees below zero. What is the temperature difference in this day?
南丹县某天的最高气温是零上10度，最低气温是零下2度，这一天的温差是多少度．
<gadget id="calculator">10 - (-2)</gadget>
<output>12</output>

<result>12</result>