On a certain day in Yongzhou City, the minimum temperature is -1°C and the maximum temperature is 6°C. What is the temperature difference in this day?
永州市某日最低气温-1℃，最高气温6℃，这一天的温差是多少℃．
<gadget id="calculator">6 - (-1)</gadget>
<output>7</output>

<result>7</result>