Toggle built-in LED attached to PC13

Core/Scr/main.c

/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
  // Place your code HERE!
  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */
  // Place your code HERE!
}
/* USER CODE END 3 */

Toggle with HAL_GPIO_WritePin and HAL_Delay

// Toggle built-in LED attached to PC13
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET); // LED ON
HAL_Delay(100); /* Insert delay 100 ms */
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET); // LED OFF
HAL_Delay(100); /* Insert delay 100 ms */

Toggle with HAL_GPIO_TogglePin

// Toggle built-in LED attached to PC13
HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_13);
HAL_Delay(100); /* Insert delay 100 ms */

Toggle with HAL_GPIO_WritePin if Button is pressed

// If Button Is Pressed
if (HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_0))
  HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET); // LED OFF
else
   HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET); // LED ON