Resetting a variable

I am making a throwing script where the player throws a ball. But I want the initial velocity to go down to 0 after the player throws is everytime. How do I make it work? Here is my code. Thanks in advance :)

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class Throw : MonoBehaviour { [SerializeField] float InitialVelocity; [SerializeField] float Angle; [SerializeField] Transform _FirePoint; private float angle; private float v;//initial velocity private bool IsThrown;

 private void Update()
 {
     if (Input.GetKey(KeyCode.Space))
     {
         //this.angle = Angle * 3;
         //v0 = InitialVelocity * -0.5f;
         //Debug.Log(angle);
         Debug.Log(v);
         Increment();
         StopAllCoroutines();

         StartCoroutine(Coroutine_Movement());
         IsThrown = true;
         
     }
   

 }
 IEnumerator Coroutine_Movement()
 {
     float t = 0; //time
     while (t < 100)
     {
         float x = v * t * Mathf.Cos(angle);
         float y = v * t * Mathf.Sin(angle) - (1f / 2f) * -Physics.gravity.y * Mathf.Pow(t, 2);
         transform.position = _FirePoint.position + new Vector3(x, y + 1f, 0);
         t += Time.deltaTime;
         yield return null;
         //v0 = 0;

     }
     

 }

 private void Increment()
 {
     if(Input.GetKey(KeyCode.Space))
     {
         //angle = Angle * Time.deltaTime;
         v += (InitialVelocity + 0.2f) * Time.deltaTime;
     }
 }

}