# Variables

You can specify variables for deployment groups and deployment targets with the `vars` property. It is an object whose keys are variable names and values contain the values for the corresponding variables. Variable values can be strings, numbers, booleans, objects or lists of the aforementioned types. 

Deployment groups inherit variables from their parents, and deployment targets inherit variables from the deployment group they belong to.

If you want to apply variables to all deployment groups and targets, you can define the `vars` property at the top-level of the deployment configuration.

#### Example

Here's how you could use variables:

{% code title="deployment/targets.yml" %}

```yaml
vars:
  cost-center: 12345
  budget: 2000

deploymentGroups:
  all:
    configSets: security
  all/shared:
    vars:
      cost-center: 10000 
      budget: 500 
    targets:
      - name: infra
  all/application:
    configSets: networking
    deploymentRoleName: deployer
    vars:
      cost-center: 600
  all/application/dev:
    targets:
      - name: dev-environment
        vars:
          environment: dev
      - name: sandbox
        vars:
          environment: sandbox
  all/application/prod:
    targets:
      - name: prod-environment
        vars:
          environment: prod
          budget: 3000
```

{% endcode %}

We specify **cost-center** and **budget** variables to be applied to all deployment groups and targets using the top-level `vars` property. The **all/shared** deployment group overrides both of these variables, and **all/application** overrides only the **cost-center**. The targets located under the **all/application** specify a new variable named **environment**. The **prod-environment** target overrides the **budget** variable. 


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