Make character stand still when player stops

Hey there folks. When i stop pressing arrow keys my character stops. But he's stuck on running animation. I want it to switch to Idle animation.
Here's my code:

 

Have you printed out the values you use to set the animator's animation blending? You probably derive idle-walk-run from that Magnitude float you set?

It's most likely wrong and that's why your animator continues performing walk animation even if the GameObject on the screen has stopped moving.

But it would help if you also showed your animator setup, there could be something wrong, too

 

That's my animator setup

 

And yes you are right about idle-walk-run. But i don't know how i can fix it. I'm not using a walk animation so that's the problem like you said. Please help me out!