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Code Playground

Draft and practice code. JavaScript and Python run in your browser; Rust compiles and runs via play.rust-lang.org; Solidity compiles with solc.

Tip: Ctrl/Cmd + Enter runs your code
// Try it: log a (pretend) blockchain
const block = { index: 1, hash: "0xabc", prev: "0x0" };
console.log("mined:", block);

Output
Run your code to see output here.