Cannot implement a Run button, Beginner error

Questions & Answers
1

using UnityEngine;
using System.Collections;

[RequireComponent (typeof(CharacterController))]
public class FirstPlayerController : MonoBehaviour {

public float movementSpeed = 5.0f;
public float mouseSensitivity = 5.0f;
public float jumpSpeed = 7.5f;

float verticalRotation = 0;
public float upDownRange = 60.0f;

float verticalVelocity = 0;

CharacterController characterController;

// Use this for initialization
void Start () {
	Screen.lockCursor = true;
	characterController = GetComponent<CharacterController>();
}

// Update is called once per frame
void Update () {
	// Rotation
	
	float rotLeftRight = Input.GetAxis("Mouse X") * mouseSensitivity;
	transform.Rotate(0, rotLeftRight, 0);

	
	verticalRotation -= Input.GetAxis("Mouse Y") * mouseSensitivity;
	verticalRotation = Mathf.Clamp(verticalRotation, -upDownRange, upDownRange);
	Camera.main.transform.localRotation = Quaternion.Euler(verticalRotation, 0, 0);
	

	// Movement
	
	float forwardSpeed = Input.GetAxis("Vertical") * movementSpeed;
	float sideSpeed = Input.GetAxis("Horizontal") * movementSpeed;
	
	verticalVelocity += Physics.gravity.y * Time.deltaTime;
	
	if ( Input.GetButtonDown ("Left Shift") ) {
		movementSpeed * 1.5;
	}
	
	if( characterController.isGrounded && Input.GetButton("Jump") ) {
		verticalVelocity = jumpSpeed;
	}
	
	Vector3 speed = new Vector3( sideSpeed, verticalVelocity, forwardSpeed );
	
	speed = transform.rotation * speed;
	
	
	characterController.Move( speed * Time.deltaTime );
}

}

Error CS1525 (on movementSpeed * 1.5) i think i formatted this wrong

2

Probably you need

1.5f

by default 1.5 is a double which c# will not convert automatically. So you get a type error.

But your error might also be that there is nothing happening on that line.

movementSpeed * 1.5;

You are multiplying but not storing the value.

Maybe you meant:

movementSpeed = 1.5f;
3

if ( Input.GetButtonDown (“Left Shift”) )
{
movementSpeed = 10.0f; //Run speed you want.
}

else
{
    movementSpeed = 5.0f;
}