# Introduction

The language analyzers calculate the different code metrics that will be used to evaluate the code quality:

* Code metrics are used in [overview](https://docs.sonarsource.com/sonarqube-server/10.8/user-guide/rules/overview "mention") to raise issues, for example, when a certain level of complexity is reached for a function in the code.
* Code metrics are used in the [quality-gates](https://docs.sonarsource.com/sonarqube-server/10.8/instance-administration/analysis-functions/quality-gates "mention") definition. For example, you can set a condition on the total number of raised issues in the code.
* The mode of your SonarQube Server instance, either [mqr-mode](https://docs.sonarsource.com/sonarqube-server/10.8/instance-administration/analysis-functions/instance-mode/mqr-mode "mention") or [standard-experience](https://docs.sonarsource.com/sonarqube-server/10.8/instance-administration/analysis-functions/instance-mode/standard-experience "mention"), will determine which code metrics you see in the UI.

You can use different tools in the SonarQube Server UI to monitor and compare your project or portfolio’s code metrics.

{% hint style="info" %}
If you’re using an external monitoring system, you can retrieve the metric values through the [web-api](https://docs.sonarsource.com/sonarqube-server/10.8/extension-guide/web-api "mention").
{% endhint %}

## Related pages <a href="#related-pages" id="related-pages"></a>

* [metrics-definition](https://docs.sonarsource.com/sonarqube-server/10.8/user-guide/code-metrics/metrics-definition "mention")
* [monitoring-project-metrics](https://docs.sonarsource.com/sonarqube-server/10.8/user-guide/code-metrics/monitoring-project-metrics "mention")
* [monitoring-portfolio-metrics](https://docs.sonarsource.com/sonarqube-server/10.8/user-guide/code-metrics/monitoring-portfolio-metrics "mention")
* [metrics-parameters](https://docs.sonarsource.com/sonarqube-server/10.8/instance-administration/analysis-functions/metrics-parameters "mention")