Hi there!
I created a very simple character, with rigging and everything
now I started to animate it with a walk cycle, so I animated the first two steps.
my question is: how is possible to create an animation loop of the walkcycle? If I want the character to walk forward, now that i got the first two steps done.
I suppose I should set something with the animation curves in the Channel editor, but what?

no answers? this mean that I can't creat an animation loop in houdini?

Several ways to do this.

Easiest is to use Motion Effects to loop your animation. RMB on the channels and then choose the Cycle Animation option.

This will do the looping in CHOPs.

You can also use cycle() function directly after the last set of keys in your cycled animation. Easy to do this in the Channel Spreadsheet accessed through the Channel Editor pane.

float cycle (float f1, float f2)
REPLACED BY
hou.cycle

Channel segment function: repeats animation from previous frames.

Repeats the animation from frames <f1> to <f2>.

If you wish to repeat the animation cumulatively, use the cycleoffset
function instead.

RELATED
* cyclet
* cycleoffset
* cycleoffsett