## `toString`

### Signature

```solidity
function toString(address value) external returns (string memory);
function toString(bool value) external returns (string memory);
function toString(uint256 value) external returns (string memory);
function toString(int256 value) external returns (string memory);
function toString(bytes32 value) external returns (string memory);
function toString(bytes value) external returns (string memory);
```

### Description

Converts any type to its string representation. Useful for operations that require strings, such as the [`ffi`](/reference/cheatcodes/ffi) cheatcode.

Bytes are converted to a hex string prefixed with `0x`.

### Parameters

| Parameter | Type    | Description           |
|-----------|---------|-----------------------|
| `value`   | varies  | The value to convert  |

### Returns

| Type     | Description                    |
|----------|--------------------------------|
| `string` | The string representation      |

### Examples

```solidity [test/ToString.t.sol]
uint256 number = 420;
string memory stringNumber = vm.toString(number);
assertEq(stringNumber, "420");
```

```solidity [test/ToString.t.sol]
bytes memory testBytes = hex"7109709ECfa91a80626fF3989D68f67F5b1DD12D";
string memory stringBytes = vm.toString(testBytes);
assertEq(stringBytes, "0x7109709ecfa91a80626ff3989d68f67f5b1dd12d");
```

```solidity [test/ToString.t.sol]
address testAddress = 0x7109709ECfa91a80626fF3989D68f67F5b1DD12D;
string memory stringAddress = vm.toString(testAddress);
assertEq(stringAddress, "0x7109709ECfa91a80626fF3989D68f67F5b1DD12D");
```

### Related Cheatcodes

* [`parseUint`](/reference/cheatcodes/parse-uint) - Parses string to uint
* [`parseAddress`](/reference/cheatcodes/parse-address) - Parses string to address
* [`ffi`](/reference/cheatcodes/ffi) - Calls external commands (often needs string arguments)