There are 8 steps in a staircase. If it is stipulated that each step can only take one or two steps, how many different ways are there to climb the 8 steps?
有一楼梯共8级，如果规定每步只能跨上一级或两级，要登上8级台阶共有多少种不同走法．
<gadget id="calculator">2 + 1 + 2 + 1 + 2 + 2 + 1 + 2 + 1 + 2 + 2 + 1 + 2 + 2 + 1 + 2 + 1 + 2 + 2 + 1 + 2</gadget>
<output>34</output>

<result>34</result>