Numeric separators & Bigint

Numeric separators

const largeNumber = 123_456_789;

• use _ to separate the number into 3 groups of 3 digits each

Bigint

• represent integer values which are too high or too low to be represented by the number primitive
  • useful in contexts requiring precise handling of large integers, such as cryptography, or when interacting with databases that use large integer identifiers
    • 🗃️Database
• created by
  • appending n to the end of an integer literal
  • using the BigInt constructor (mentioned in JS constructors & Examples)

const previouslyMaxSafeInteger = 9007199254740991n;
 
const alsoHuge = BigInt(9007199254740991);
// 9007199254740991n
 
const hugeString = BigInt("9007199254740991");
// 9007199254740991n
 
const hugeHex = BigInt("0x1fffffffffffff");
// 9007199254740991n
 
const hugeOctal = BigInt("0o377777777777777777");
// 9007199254740991n
 
const hugeBin = BigInt(
  "0b11111111111111111111111111111111111111111111111111111",
);

• you can’t mix BigInt and other types (like doing subtraction), you need explicit conversions