2D Platformer Receiving Input on Phone

Hi,

I have Android set as my desired platform in Unity. I'm making a 2D platformer but am concerned when it comes to user input. When coding for movement, I'm tempted to use the arrow keys but can't transfer that concept to Android.

I'm thinking of putting up down left right buttons on a canvas to move the player around. Any ideas?
And I'm curious, what would happen if I set the player's movement to be received from arrow keys then did build and run for Android? How would the phone account for how to move the player?

Thank you.

 

https://docs.unity3d.com/ScriptReference/Input.GetTouch.html
https://docs.unity3d.com/ScriptReference/Touch.html

Some functions will/can be transferred in Build and Run for Android. However, I see that the when we call Input.GetTouch we construct a Touch struct. This allows us to account for Android controls on the mobile device.