# Environment Variables

While allowing for using the same values repeatedly in different Processes, Environment Variables are also the key for successful CI/CD operations. Through using the Environment Variables to separate Environments by their source or target systems, it's possible to deploy new and changed Processes with just a click of a button, no changes needed in the Process for deployment.

## Environment Variables

In case it is global values you need in multiple Processes, or values that are Environment specific, such as different credentials and connection points for testing and production, Environment Variables are there to take care of them. 

<figure><img src="/files/8m5K45JCOsQbvgGHigB9" alt="Environment variables are global values for each environment."><figcaption><p>Environment Variables are the global values for each Environment.</p></figcaption></figure>

Environment Variables are defined centrally in the Environment Variables section of Frends Control Panel, and can hold groups of values for different purposes. Values can be grouped together by their purpose, such as per target system or for specifically global error handling, and the values themselves can be textual, numerical, lists or secrets.&#x20;

As the key feature of Environment Variables, each Environment in your Frends Tenant can receive separate values for the same variable. This makes it easy to develop and test the integrations using test values and other test environments, and when the Process is ready, it can be deployed to production without any changes to the Process itself, because the Environment-specific values are defined separately and centrally in Environment Variables.

<figure><img src="/files/q1ry7EdrCNLzlJ70CxKU" alt="Using environment variables is recommended for example for connection parameters."><figcaption><p>Using Environment Variables is recommended for example for connection parameters.</p></figcaption></figure>


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