# getMappingLength

Description: getMappingLength cheatcode documentation

Note: This document was authored using MDX

  Source: https://github.com/NomicFoundation/hardhat-website/tree/main/src/content/docs/docs/reference/cheatcodes/Environment/get-mapping-length.mdx

### Signature

```solidity
function getMappingLength(
  address target,
  bytes32 mappingSlot
) external returns (uint256 length);
```

### Description

Gets the number of elements in the mapping at the given slot, for a given address.