> ## Documentation Index
> Fetch the complete documentation index at: https://docs.starknet.io/llms.txt
> Use this file to discover all available pages before exploring further.

# core::starknet::syscalls::get_block_hash_syscall

Returns the hash of the block with the given number.

## Signature

```rust theme={null}
pub extern fn get_block_hash_syscall(block_number: u64) -> Result> implicits(GasBuiltin, System) nopanic;
```

#### Arguments

* `block_number` - The number of the queried block.

#### Returns

* The hash of the block with the given number.