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Numbers · medium

33. Numbers, BigInt and Token Amounts

Precision limits and BigInt arithmetic.

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JavaScript numbers are IEEE-754 double floats, exact only up to `2^53 - 1` (`Number.MAX_SAFE_INTEGER`). On-chain tokens require `bigint` to avoid rounding errors.

js
const wei = 1_500000000000000000n; // 1.5 ETH
const gasLimit = 21000n;

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  1. 1. What is Number.MAX_SAFE_INTEGER?

  2. 2. What happens when you evaluate 10n + 5?

  3. 3. How do you represent a BigInt literal?

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