I want to know the purpose of using the EEPROM because I can't get it,
I mean I know that it can store values for a long time, but I just can't get the goal here




   

     #include<EEPROM.h>
    void setup()
    {
      Serial.begin(9600);
      EEPROM.write(0,4);
      int s=EEPROM.read(0);
      int f=10;
      Serial.print(s); 
        Serial.print(" ");
      Serial.print(10);
    
    }
    
    void loop()
    {
      
    
    }





for example, im using EEPROM to see the difference if I print a value inside variable s to the serial moniter using EEPROM and a normal value inside the variable f.
but I couldn't find the difference between both because when unplugging the power and turn it on again, both of them are printed.
hope you got the idea and I hope to see some feedback.
thank you..



**the LED program**

then I made this program that will compare the EEPROM value to num.4 and compares the F variable to num.4 
known that both F and the EEPROM values are 4.
and then I changed both of the values to 3.
shouldn't the GREEN LED of the EEPROM still on because it has already stored num.4??

    #include<EEPROM.h>
    void setup()
    {
      pinMode(12,OUTPUT);
       pinMode(11,OUTPUT);
    }
    
    void loop()
    {
    
      EEPROM.write(0,4);                 //GREEN LED
        int f=4;                        //RED LED
    
      if(EEPROM.read(0)==4)
        digitalWrite(12,HIGH);
      if(f==4)
            digitalWrite(11,HIGH);   
    }