Loops, holds and returns

[mr_analog]

im trying to get my led to hold after i fad up.
and as long as the button/ sensor is held the led stay on with out looping back to the fad up.
i also want the led to stay off when the botton/sensor is off

int LEDpin = 11;     // LED on pin 11
int switchPin = 9; // momentary switch on 9, other side connected to ground
int brightness =0;
bool running = false;

void setup() {
  pinMode(LEDpin, OUTPUT);
  pinMode(switchPin, INPUT);
  digitalWrite(switchPin, HIGH);  // turn on pullup resistor
  analogWrite(11, 0);
}

void loop() 
{

  if (digitalRead(switchPin) == LOW) {
    // switch is pressed - pullup keeps pin high normally
    delay(100);                     // delay to debounce switch
               
  for (brightness = 0; brightness <= 255; brightness += 5) {
    analogWrite(11, brightness);
    delay(50);
   
     // Wait for 30 millisecond(s)
  }

  }
  else (digitalRead(switchPin) ==HIGH); {
    analogWrite(11, 0);
    }
}

this is what i have so far

IM NEW HERE Preformatted text

[xfpd]

Inside the if() statement (between the if() braces), but immediately after the for(){} statement (after the close brace of the for(){} statement), add another if (digitalRead(switchPin) == LOW) and make a loop that does nothing. This should hold the program until the button is released and the pin goes high.

    if (digitalRead(switchPin) == LOW) { // read the pushbutton, waiting for a LOW
      while (1); // NOP/do nothing loop
    } // at this point, the pushbutton has been released, continue to the else(){} statement 
    digitalWrite(switchPin, HIGH); // I neglected to include this when I first posted.

[johnwasser]

@xfpd

    if (digitalRead(switchPin) == LOW) { // read the pushbutton, waiting for a LOW
      while (1); // NOP/do nothing loop
    } // at this point, the pushbutton has been released, continue to the else(){} statement 

That 'while (1) ;' loop will freeze the sketch forever. I think you meant:

    while (digitalRead(switchPin) == LOW) { 
      // do nothing until the button is released
    } 
// at this point, the pushbutton has been released

[xfpd]

eek. I see. Thank you, Mr. Wasser and sorry Mr. Log.

[mr_analog]

thank you very much
adding that "while" did the job