unknown variable of target script

Questions & Answers
1

so - i try to set up name of target script, and change target value. (code below)
but i got truble on this line:

comp.ValueName -= 20f;

Because ValueName is variable string…

public string ScriptName = "MainScript";
public string ValueName = "Health" ;

void OnEnable () {
	Component comp;
	comp = GetComponent (ScriptName);
	try {
		comp.ValueName -= 20f;
	}
	catch{
	}
}

is it possible?

2

public float Value = 100f;
public string ValueName = “Health”;
Value -= 20f;
ValueName = "Health: " + Value.ToString();