Question on stepper motor functionality

at initial when uploaded code, stepper motor able step 6 times , when unplugged usb power , plugged in again motor step backwards once , move forward 5 times. can explain me what's going on. below coding.

code: [select]



#include <stepper.h>

const int stepsperrevolution = 48;  // change fit number of steps per revolution
                                     // motor

// initialize stepper library on pins 8 through 11:
stepper mystepper(stepsperrevolution, 2,3,4,5);           

int stepcount = 0;         // number of steps motor has taken

void setup() {
  // initialize serial port:
  serial.begin(9600);
 
   for(int = 0; <= 12; i++){
   
    mystepper.step(1);
    serial.print("steps:" );
    serial.println(stepcount);
    stepcount++;
    delay(500);
  } 
}


code: [select]



#include <stepper.h>

const int stepsperrevolution = 48;  // change fit number of steps per revolution
// motor

// initialize stepper library on pins 8 through 11:
stepper mystepper(stepsperrevolution, 2,3,4,5);           

int stepcount = 0;         // number of steps motor has taken

void setup() {
  // initialize serial port:
  serial.begin(9600);

 
}
void loop()
{
  for(int = 0; <= 12; i++)
  {

    mystepper.step(1);
    serial.print("steps:" );
    serial.println(stepcount);
    stepcount++;
    delay(500);
  } 
}


you dont have loop function in code. upload code

Arduino Forum > Using Arduino > Programming Questions > Question on stepper motor functionality

arduino