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📘 TypeScript Data Types

Welcome to this short guide! TypeScript adds types to JavaScript, making your code safer and easier to manage. Below are the essential data types in TypeScript, with simple explanations. 🚀

⚡️ 1. Number

  • Example: let age: number = 25;
  • Numbers include integers and decimals (e.g., 10, 3.14).

⚡️ 2. String

  • Example: let name: string = "Saurabh";
  • Represents text (always enclosed in quotes).

⚡️ 3. Boolean

  • Example: let isActive: boolean = true;
  • Holds either true or false values.

⚡️ 4. BigInt

  • Example: let bigNum: bigint = 9007199254740991n;
  • Used for very large numbers beyond Number limits. Add n at the end.

⚡️ 5. Array

  • Example: let numbers: number[] = [1, 2, 3];
  • Holds a list of values of the same type.

⚡️ 6. Tuple

  • Example: let person: [string, number] = ["Alice", 30];
  • Fixed-size arrays with known types for each element.

⚡️ 7. Any

  • Example: let data: any = "Hello";
  • Can store any type. Use carefully!

⚡️ 8. Unknown

  • Example: let input: unknown = 42;
  • Similar to any, but safer. Requires type checking before use.

⚡️ 9. Void

  • Example:
function logMessage(): void {
  console.log("Hello");
}
  • No value is returned (used in functions).

⚡️ 10. Never

  • Example:
function error(): never {
  throw new Error("Something went wrong");
}
  • Represents functions that never return (e.g., errors).

⚡️ 11. Enum

  • Example:
enum Direction {
  Up = 1,
  Down,
  Left,
  Right,
}
let move: Direction = Direction.Up;
  • A way to define named constants.

That’s it! TypeScript’s types help you write reliable, error-free code. Happy coding! 🎉