A loop seems to do the function twice if the number is double digits?

Questions & Answers
1

I have a loop function which is supposed to make a poison effect to the player, I feed it a value, it starts depleting 1 health per second the health based on the value, it works perfectly with one-digit numbers, but for some reason, if the value is double digits it depletes 2 health per second instead of one. Does anyone know why?

public int karmaValue;
public int karmaNo;

private HealthScript healthScript;
KRBar kRBar;

private void Start()
{
    healthScript = GameObject.Find("Player Soul").GetComponent<HealthScript>();
    kRBar = GetComponent<KRBar>();
}
private void Update()
{
   KarmaDamage();
}

void KarmaDamage()
{
    for (int i = 0; i < karmaValue; karmaNo--)
    {

        healthScript.karmaHealth -= 1; //Deplete Health 
        kRBar.SetKRHealth(healthScript.karmaHealth); //Visualize
        KarmaNo(); //Make the next value equal to the original value
        karmaValue = 0; //Make value 0 so it doesn't do the loop more than once
        Invoke("NewKarma", 1); //Make new value 1 less the new value after 1 second
    }
}
void KarmaNo()
{
    karmaNo = karmaValue;
}
void NewKarma()
{
    karmaValue = karmaNo;
}
2

Disclaimer: I haven’t tested the following code

[Min(0.01f)] public float DamageTickInterval = 1;
[Min(0.01f)] public float DamageAmount = 1;
private HealthScript healthScript;
private KRBar kRBar;
private float timer;
private void Start()
{
    healthScript = GameObject.Find("Player Soul").GetComponent<HealthScript>();
    kRBar = GetComponent<KRBar>();
    timer = DamageTickInterval;
}
private void Update()
{
    KarmaDamage();
}
void KarmaDamage()
{
    timer += Time.deltaTime;
    while(timer > DamageTickInterval)
    {
        timer -= DamageTickInterval;
        healthScript.karmaHealth -= DamageAmount;
        kRBar.SetKRHealth(healthScript.karmaHealth);
    }
}