## `delta`

### Signature

```solidity
function delta(uint256 a, uint256 b) internal pure returns (uint256)
```

```solidity
function delta(int256 a, int256 b) internal pure returns (uint256)
```

### Description

Returns the difference between two numbers in absolute value.

### Example

```solidity
uint256 four = stdMath.delta(-1, 3);
```
