NRF24l01 LED Remote Modification not working

Using Arduino Programming Questions
18 
if (downswitchReading = 1) {
    DATA = 100;
  }

  else if (downswitchReading = 0 ){
    DATA = 200;
  }

  if (upswitchReading = 1) {
    DATA = 300;
  }
  else if (upswitchReading == 0) {
    DATA = 200;
  }

  Serial.println("DATA = ");
  Serial.println(DATA);

  radio.write( &DATA, sizeof(DATA) );

}

== inside the if() conditionals