# Import

The import directive is used to import items from other Ola files. This can be useful to keep a single definition in one file, which can be used in multiple other files. For example, you could have an interface in one source file, which several contracts implement or use which are in other files.

In order to use the code from other files, we can import them into our program using the keyword `import` and `as`with the corresponding file name. Using `import` makes it easier for us to import some modular ibs, eliminating the need for repeated development. The basic syntax is as follow,`path-spec`can be absolute path(the full path of source file) or relative path (file path starts with`./` or `../`).

```solidity
import "path-spec"
```

e.g.:

```solidity
import "./math/u256.ola";
import "crypto/sha256.ola"
import "erc20.ola"
```