BigInt and Symbol
Bigint and Symbol
π¨βπΌ Nice work! You now know all of TypeScript's primitive types.
π¦ When to use these types:
BigInt:
- Financial calculations requiring precision beyond
number - Cryptographic operations
- Working with database IDs that exceed safe integer limits
- Any math requiring very large integers
Symbol:
- Creating unique object keys that won't collide with string keys
- Library-internal properties that shouldn't be accessed directly
- Well-known symbols like
Symbol.iteratorfor custom iteration
In practice,
number, string, boolean, null, and undefined cover 99% of
use cases. But it's good to know bigint and symbol exist when you need them!// The complete set of TypeScript primitives:
const str: string = 'hello'
const num: number = 42
const bool: boolean = true
const nul: null = null
const undef: undefined = undefined
const big: bigint = 9007199254740993n
const sym: symbol = Symbol('unique')