ARM M4 Digital Input

 1) Blink on Green led once when switch S1 press in launchpad

void setup()
{              
  pinMode(PF_3, OUTPUT);       // setting PF.3 Pin as output
   digitalWrite(PF_3, HIGH);   // turn the GREEN LED on
  delay(1000);               // wait for a second
  digitalWrite(PF_3, LOW);    // turn the GREEN LED  off by making the voltage LOW
  delay(1000);
  pinMode(PF_4, INPUT_PULLUP);
}

void loop() {
    if(!digitalRead(PF_4)) //checking for logic zero
  {
  digitalWrite(PF_3, HIGH);   // turn the GREEN LED on
  delay(1000);               // wait for a second
  digitalWrite(PF_3, LOW);    // turn the GREEN LED  off by making the voltage LOW
  delay(1000);               // wait for a second
}
}

2)  Blink on Blue led once when switch S2 press in launchpad

void setup()
{              
  pinMode(PF_2, OUTPUT);        // setting PF.2 Pin as output
  pinMode(PF_0, INPUT_PULLUP);  // setting PF.0 Pin as input with pull up
}

void loop() {
   if(!digitalRead(PF_0)) //checking for logic zero
  {
  digitalWrite(PF_2, HIGH);   // turn the GREEN LED on
  delay(1000);               // wait for a second
  digitalWrite(PF_2, LOW);    // turn the GREEN LED  off by making the voltage LOW
  delay(1000);               // wait for a second
}
}

3)  Blinks Blue led once when switch S1 presses and Blinks Green led once when switch S2 presses on the launchpad

void setup()
{              
  pinMode(PF_2, OUTPUT);        // setting PF.2 Pin as output
   pinMode(PF_3, OUTPUT);        // setting PF.3 Pin as output
  pinMode(PF_0, INPUT_PULLUP);  // setting PF.0 Pin as input with pull up
  pinMode(PF_4, INPUT_PULLUP);  // setting PF.4 Pin as input with pull up
}

void loop() {
   if(!digitalRead(PF_0)) //checking for logic zero
  {
  digitalWrite(PF_3, HIGH);   // turn the GREEN LED on
  delay(1000);               // wait for a second
  digitalWrite(PF_3, LOW);    // turn the GREEN LED  off by making the voltage LOW
}
  if(!digitalRead(PF_4)) //checking for logic zero
  {
  digitalWrite(PF_2, HIGH);   // turn the BLUE LED on
  delay(1000);               // wait for a second
  digitalWrite(PF_2, LOW);    // turn the BLUE LED  off by making the voltage LOW
}
}