How To Repeat a the specific Code in Void loop() No Of Times

Question

Hello Friends i Am creating a dc motor controller (for leg extension machine) which moves motor between two points specified by two potentiometers and as a feedback third potentiometer is used my code is as follows

#include <SPI.h>
#include <Wire.h>
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);

int Extension = A0 ;
int Extension_value ;
int Flexion = A1 ;
int Flexion_value ;
//int Pot_speed = A2 ;
int pot_position = A2 ;
int position_value ;

int forward = 11 ;
int forward_state ;
int reverse = 12 ;
int reverse_state;

int s_limit = 2 ;
int e_limit = 3 ;

bool done = false ;

int up = 4 ;
int dn = 5 ;
int sel = 6 ;
int fwd = 7 ;
int rev = 8 ;

int button1 = 0 ;
int button2 = 0 ;
int count_value = 0 ;
int prestate = 0 ;

int button3 = 0 ;
int button4 = 0 ;
int button5 = 0 ;

int sel_prestate = 0 ;
int fwd_prestate = 0 ;
int rev_prestate = 0 ;

int sel_state = 0 ;
int fwd_state = 0 ;
int rev_state = 0 ;

void setup() {

    lcd.init();
    lcd.backlight();

///////////////////////////HOMING//////////////////

homing();

///////////////////INPUT OUTPUT//////////////////
  pinMode (Extension , INPUT) ;
  pinMode (Flexion , INPUT) ;
  pinMode (pot_position , INPUT) ;
  pinMode (up , INPUT) ;
  pinMode (dn , INPUT) ;
  pinMode (sel , INPUT) ;
  pinMode (fwd , INPUT) ;
  pinMode (rev , INPUT) ;
  pinMode (forward , OUTPUT) ;
  pinMode (reverse , OUTPUT) ;
  
   
  Serial.begin(115200);

digitalWrite (reverse , LOW);
digitalWrite (forward ,LOW);
}

void loop() {

 button1 = digitalRead (up) ;
 button2 = digitalRead (dn) ;
 button3 = digitalRead (sel) ;
 button4 = digitalRead (fwd) ;
 button5 = digitalRead (rev) ;
 
///////////////////Buttons////////////////////////////

if (button1 == HIGH && prestate == 0) {
    count_value++;  
    prestate = 1;
  }
else if (button2 == HIGH && prestate == 0) {
    count_value--;
    prestate = 1;
  } 
 else if(button1 == LOW && button2 == LOW) {
    prestate = 0;
  }
if(count_value<0){
count_value = 0;
}

//////////////mapping and displaying pot values ////////////////////////////
  Extension_value = analogRead (Extension) ;
  Extension_value = map(Extension_value, 0, 1023, 0, 120) ;
  Flexion_value = analogRead (Flexion) ;
  Flexion_value = map(Flexion_value, 0, 1023, 0, 120) ;
  position_value = analogRead (pot_position) ;
  position_value = map(position_value, 0, 1023, 0, 120) ;
/////////////////////////////LCD PRINT/////////////////////////////////////
lcd.setCursor(0,0);
lcd.print("Ex:");
lcd.print (Extension_value);
lcd.setCursor(7,0);
lcd.print("Fx:");
lcd.print(Flexion_value);

lcd.setCursor(0,1);
lcd.print("ExAngle:");
lcd.print(position_value);
lcd.print(" Rp:");
lcd.print(count_value);
////////////////////////// NEW CODE //////////////////////////////////////////

if (button3 == HIGH && sel_prestate == 0){
    sel_state = 1 ;
  }

//////////////////////// Motor Movement //////////////////////////////////////

     if (sel_state > 0 ){
      movemotor();
    }
   
//////////////////////////////////////////////////////////////////////////
//count_value = count_value  - 1  ;

}
//////////////// Homing Function////////////////////////
void homing()
{
  while(digitalRead(s_limit)== HIGH){
        digitalWrite(reverse , HIGH);
        lcd.setCursor(0, 0);
        lcd.print("INITIALISING PLS ");
        lcd.setCursor (0 ,1);
        lcd.print("WAIT.......");
    delay(200);
        lcd.clear();
}
}
/////////////// Motor Movement//////////////////////////  
 void movemotor()
 {
    if (Flexion_value < position_value){
      digitalWrite (reverse , HIGH);
      digitalWrite (forward , LOW);
}

    if (Extension_value > position_value){
      digitalWrite (forward , HIGH);
      digitalWrite (reverse , LOW);
}
 }
////////////////////////////////////////////////////////////////

i want to repeat ///// Motor Movemnt//////////// part count_value no of times ... and suggesions would be helpful i tried using while loop but potentiometer input freezed also tried using for loop but it not seems to work

    //////////////////////// Motor Movement //////////////////////////////////////

     **if (sel_state > 0 ){
      movemotor();
    }**
  //////////////////////////////////

Answer 1

With your current code the back and forth movement should already loop forever. To reduce that to a fixed number of times you can define a counter variable, increase it in movemotor() on direction change for both sides or only one of them (depending on how you want to count) and execute movemotor() only if the counter variable is below the target. So something like this:

Introduce the counter variable and target at global scope (in this case for repeating 5 times):

int movement_counter = 0;
int movement_target_number = 5;

Then in loop() add the if condition to execute movemotor() only below the movement_target_number:

if (sel_state > 0 && movement_counter < movement_target_number){ movemotor(); }

And now we only need to increment movement_counter inside of movemotor(). In this case we increase the counter on every full back and forth movement:

void movemotor()
{
  if (Flexion_value < position_value){
    digitalWrite (reverse , HIGH);
    digitalWrite (forward , LOW);
    movement_counter++;
  }
  if (Extension_value > position_value){
    digitalWrite (forward , HIGH);
    digitalWrite (reverse , LOW);
  }
}

You can change movement_target_number to your liking and you can also reset movement_counter at some point in your program to move again.