There are 8 steps, and Xiao Ming walks up from the bottom. If he can only cross one or two steps at a time, how many different ways can he walk up?
有8级台阶，小明从下向上走，若每次只能跨过一级或两级，他走上去可能有多少种不同方法．
<gadget id="calculator">1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1</gadget>
<output>34</output>

<result>34</result>