Definition

Types define the structure of data in a GraphQL schema.

They specify what fields exist and what type of data each field returns.

Object Types

Object types represent real-world entities and contain fields.

type User {
  id: ID!
  name: String!
  age: Int
}

• User is an object type
• Each field has a defined type
• ! means the field is non-nullable

Scalar Types

Scalars represent primitive values.

Built-in scalars:

• Int
• Float
• String
• Boolean
• ID

Example: