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This version of Unity is unsupported.

Mathf.Sign

public static float Sign(float f);

Description

Returns the sign of f.

Return value is 1 when f is positive or zero, -1 when f is negative.

using UnityEngine;

public class Example : MonoBehaviour { void Start() { Debug.Log(Mathf.Sign(-10)); Debug.Log(Mathf.Sign(10)); } }