15 lines
699 B
Markdown
15 lines
699 B
Markdown
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---
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title: "Overview"
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---
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An _app_ interacts with a Solana cluster by sending it _transactions_ with one
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or more _instructions_. The Solana _runtime_ passes those instructions to
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_programs_ deployed by app developers beforehand. An instruction might, for
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example, tell a program to transfer _lamports_ from one _account_ to another or
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create an interactive contract that governs how lamports are transferred.
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Instructions are executed sequentially and atomically for each transaction. If
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any instruction is invalid, all account changes in the transaction are
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discarded.
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To start developing immediately you can build, deploy, and run one of the
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[examples](developing/deployed-programs/examples.md).
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