Assigning values to a function()

Code Library : F : Function Values

/* what you need to look for here is the "24" 8' DashedLine(24)
 * and combine this with the "int len" in DashedLine(int len)
 * those correspond. the 24 is the integer value (called for
 * with int len) assigned to the function and thus giving
 * "len" in the function the value of 24
 */

void setup() {
  Serial.begin(9600);
  
  // draw the menu box
  DashedLine(24);
  Serial.println("| Program Options Menu |");
  DashedLine(24);
}

void loop() {
}

void DashedLine(int len)
{
  int i;
  
  // draw the line
  for (i = 0; i < len; i++) {
    Serial.print("-");
  }
  // move the cursor to the next line
  Serial.println("");
}