Type Inference

TypeScript can automatically infer types from values, so you don't always need explicit annotations.

Automatic Inference

When to Use Explicit Types

Use explicit types when:

1. The inference isn't what you want
2. For function parameters
3. For better documentation

Contextual Typing

TypeScript uses context to infer types:

Object Inference

Best Practices

Exercise: Let TypeScript Infer

Remove unnecessary type annotations (keep only where needed):