On a certain day in Yueyang City, the minimum temperature is -2°C and the maximum temperature is 5°C. What is the temperature difference in this day?
岳阳市某日最低气温-2℃，最高气温5℃，这一天的温差是多少℃．
<gadget id="calculator">5 - (-2)</gadget>
<output>7</output>

<result>7</result>