# Variable

### define variables

Define variables in the JSON file

{% code title="main.json" %}

```json
{
    "variable1": "hello",
    "variable2": "world"
}
```

{% endcode %}

### use variables

To use variables in a markdown file, it is necessary to start with the "v -" directive

{% code title="main.md" %}

```markdown
# variable
<!--{v-variable1}--> : <!--{v-variable2}-->
```

{% endcode %}

### compiler results

{% code title="dist/build.md" %}

```markdown
# variable
hello : world
```

{% endcode %}