The UmLet is as follows:
runSpeed is a float variable which is used to register the speed for movement.
_crb is used to register the RigidBody, as the character moves by modifying the Rigidbody.
_anim is used to access the animator, in order to set up animations of the character when making the movement.
F_Right is used to verify if the player is facing the right direction, not the left one.
fr_bk is a variable which controls the movement on the z-axis, according to the camera set up
in_out is a variable which is used to control the movement on the x-axis, as well dependent on the camera set up
jmp is the variable used to register the value for the jump, that is used when moving on the y-axis
The results of the code are the basic movement on the x, y(jump), z axes and the turn around when going in a reverse direction.