---
title: "turns::HALF_TURN"
subtitle: "Constant in std::turns"
excerpt: "A half turn, 180 degrees or π radians."
layout: manual
---

A half turn, 180 degrees or π radians.

```kcl
turns::HALF_TURN: number(deg) = 180deg
```



### Type

[`number(deg)`](/docs/kcl-std/types/std-types-number) - A number.