> ## Documentation Index
> Fetch the complete documentation index at: https://starkware-9575960b-starknet-privacy-docs.mintlify.site/llms.txt
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# core::circuit::CircuitInput

Defines an input for a circuit.
Represents an input signal in the circuit, indexed by `N`. Each input must be assigned
a value before circuit evaluation.

## Signature

```rust theme={null}
pub extern type CircuitInput;
```