> Aztec.nr API reference, v6.0.0 (mainnet and testnet). Index: https://docs.aztec.network/aztec-nr-api/v6.0.0/llms.txt

# Function noinitcheck

Module: `noir_aztec::macros::functions`

```rust
pub comptime fn noinitcheck(f: FunctionDefinition)
```

A no-init-check [`external`](/aztec-nr-api/v6.0.0/noir_aztec/macros/functions/fn.external.md) function can be called even if none of the [`initializer`](/aztec-nr-api/v6.0.0/noir_aztec/macros/functions/fn.initializer.md) functions have been called yet.

Contracts that have no [`initializer`](/aztec-nr-api/v6.0.0/noir_aztec/macros/functions/fn.initializer.md) functions do not require this attribute: all of their functions behave as if they implicitly had it (i.e. they don't check for initialization nullifiers).

## Use Case

This is an optimization as it skips the initialization check, possibly reducing proving time for private functions and L2 gas for public ones.

It is dangerous attribute however, as the contract will not be able to rely on its storage having been initialized. Valid use cases include those in which the contract indirectly infers initialization, e.g. by reading one of its state variables and testing for a non-default value.