TypeScript Fundamentals: Basic Types and Conditional Branching

Writing JavaScript without type safety often leads to unexpected runtime errors that are hard to debug. TypeScript solves this by introducing a robust type system that catches errors during development before your code even runs. In this written course, you will transition from writing unpredictable JavaScript to crafting structured, type-safe code. You will build a solid foundation in TypeScript's core type system, understand how the compiler infers types, and learn to write smart conditional logic using type narrowing. What you'll learn: 1. Learn the foundational primitive types including string, number, boolean, and null/undefined. 2. Understand the difference between explicit type annotations and implicit type inference. 3. Apply conditional branching and control flow analysis to handle different data types safely. 4. Implement type guards and modern narrowing techniques to write safer conditional statements. 5. Configure strict null checks to eliminate common null pointer exceptions. 6. Practice reading and writing type-safe logic through clear code examples and exercises. The course begins with key terminology and the core philosophy of static typing, then progresses to hands-on syntax patterns, type assertions, and practical conditional structures. This course is designed for beginners who have a basic understanding of JavaScript and want to learn TypeScript from the ground up, with no prior TypeScript experience required. Start reading today to write more reliable, self-documenting code with TypeScript.