Can't get Raycast2D to work properly

Questions & Answers
1

I’m trying to make a collision detect from my character to the ground using Raycast2D but I keep getting errors and I don’t know what to change to make it work.

Below I’ve included the characters controller script and the errors.

using UnityEngine;
using System.Collections;

public class PlayerController : MonoBehaviour {

	//Floats and bools
	public float jumpSpeed = 12f;
	public float walkSpeed = 6f;
	public bool isJumping = false;
	float distToGround;
	//Component calls
	public Animator animator;
	
	void Start () {
		animator = GetComponent<Animator>();

		distToGround = collider2D.bounds.extents.y;
	}

	//Class handler more or less
	void Update () {
		Movement ();
	}

	void IsGrounded(){
		return Physics2D.Raycast(transform.position, -Vector2.up, distToGround + 0.1);
	}

	//Player movement handler
	void Movement(){
		if (Input.GetKey (KeyCode.D)) {
			transform.Translate(Vector2.right * walkSpeed * Time.deltaTime);
			//Turn 0 degrees when moving with the D key
			transform.eulerAngles = new Vector2(0, 0);
			//Set Speed float in animator to walkSpeed float
			animator.SetFloat("Speed", walkSpeed);
		}
		//Reset animator float "Speed" to 0 when D key is released
		if (Input.GetKeyUp (KeyCode.D)) {
			animator.SetFloat("Speed", 0);
		}

		if (Input.GetKey (KeyCode.A)) {
				transform.Translate (Vector2.right * walkSpeed * Time.deltaTime);
				//turn 180 degrees when moving with the A key
				transform.eulerAngles = new Vector2 (0, 180);
			    //Set Speed float in animator to walkSpeed float
				animator.SetFloat ("Speed", walkSpeed);
		}
		//Reset animator float "Speed" to 0 when A key is released
		if (Input.GetKeyUp (KeyCode.A)) {
			animator.SetFloat("Speed", 0);
		}

		if (Input.GetKeyDown (KeyCode.W)) {
			if(!isJumping && IsGrounded()){
				//Jump handler + setting isJumping to true, no inf jumps here
				rigidbody2D.AddForce(new Vector2(0, jumpSpeed), ForceMode2D.Impulse);
				isJumping = true;
				//Tells the animator that I'm jumping and loads the animation
				animator.SetBool("playerJumping", true);
			}
		}
	}

	void OnCollisionEnter2D(Collision2D col){
		if(col.gameObject.tag == "Ground"){
			isJumping = false;
			//Tells the animator that I'm grounded and to unload the animation
			animator.SetBool("playerJumping", false);
		}
	}
}

Errors:

Assets/Scripts/PlayerController.cs(26,17): error CS0127: `PlayerController.IsGrounded()': A return keyword must not be followed by any expression when method returns void

Assets/Scripts/PlayerController.cs(26,34): error CS1502: The best overloaded method match for `UnityEngine.Physics2D.Raycast(UnityEngine.Vector2, UnityEngine.Vector2, float)’ has some invalid arguments

Assets/Scripts/PlayerController.cs(26,34): error CS1503: Argument #3' cannot convert double’ expression to type `float’

Assets/Scripts/PlayerController.cs(56,29): error CS0019: Operator &&' cannot be applied to operands of type bool’ and `void’

2

Your going to have to post your errors for anyone to be able to help!