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Mathf.PI

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public static float PI;

Description

The infamous 3.14159265358979... value (Read Only).

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public float radius = 5; void Start() { float perimeter = 2 * Mathf.PI * radius; Debug.Log("The perimeter of the circle is: " + perimeter); } }

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