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You might hear the word "physics" thrown around a lot in game development, so let's go over what physics means in Unity. In the real world, objects are affected by gravity, friction, collisions, weight etc. Likewise in a game, objects are also affected by the forces of physics.

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In this module we'll be learning about a few fundamental concepts such as Rigidbody and colliders, which will assist us in making our character move. We'll also learn how to add animations to our character.

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The transform component is attached to every object in Unity. The transform components hold the x, y and z values for the position, rotation and scale properties of an object in respect to the game world co-ordinate system, or the parent object of child components.

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Understanding vectors is useful before we start making games. A vector is basically a quantity which has a direction. Vectors are useful and are used a lot in Unity. They're used to store the x, y and z values of components such as transform, rotation and scale. We cannot store these values together in a general variable. We need to use vectors for that.

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C# is an Object-Oriented Programming language in which the programmer can develop software in modules. This is accomplished through treating data as **objects**. A class is like a blueprint or template of a specific object in which its properties, fields, events and methods are specified.

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A function groups together code statements to perform a specific task. Whenever a function is called, all the code statements inside that function will execute.

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You can execute a statement or block of code multiple times using loops. This is called iteration.

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Imagine if your code could do different things based on different conditions. Well, it can! Using conditional statements we can control the flow of our programs.

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Arrays are a collection of values of the same data type. They are extremely useful data structures and help us write more complex code.

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Comments help to document your code and inform the intent of your code.

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Operators are used to carry out operations on operands. Operands are values or variables on which an operation is carried out.

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We will discuss the data types that will be used in our scripts. First let's understand what we mean by data types. A data type can be defined literally as a *type of value or values*. For example, your age is an integer, and your first name is a type of data composed of a sequence of characters.