? JavaScript BigInt

What is BigInt?

• A built-in JavaScript type to represent integers larger than the safe limit for Number.

• Normal Number can safely represent integers up to ±(2^53 - 1).

• BigInt can handle arbitrarily large integers.

How to Create a BigInt?

1. Append n to the end of an integer literal:

const big = 123456789012345678901234567890n;

2. Use the BigInt() constructor:

const big2 = BigInt("123456789012345678901234567890");

Operations with BigInt

• Supports usual arithmetic operators: +, -, *, /, %, **.

• Can’t mix BigInt with Number directly — you must explicitly convert.

const a = 10n;const b = 20n;console.log(a + b);       // 30n// Mixing types causes errorconst c = 10;// console.log(a + c);    // TypeError// Convert number to BigIntconsole.log(a + BigInt(c));  // 20n

Comparison with Numbers

console.log(10n > 5);   // trueconsole.log(10n == 10); // true (value comparison)console.log(10n === 10); // false (different types)

Use Cases for BigInt

• Cryptography

• High precision math

• Working with large datasets or IDs

Limitations

• No support for decimals (BigInt is integer-only).

• Some built-in Math functions don’t work with BigInt.

• Use carefully when interoperating with APIs expecting numbers.

If you want, I can show examples of BigInt in practical use cases or how to convert between Number and BigInt safely!