Help! For some reason, my keypad values do not work in my code.

Projects General Guidance
1

Hi, I'm a student with little experience using Arduino. I have a UNOFreaduino board, and a 5 button keypad for this segment of the code.

code is as follows:

int x = analogRead(A0);
int tubeNum = 1;

void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
}

void keypad() {
if (0<=x && x<=15) {
tubeNum = tubeNum + 1;
}
else if (40<=x && x<=55) {
tubeNum = tubeNum - 1;
}
else if (540<=x && x<=555) {
tubeNum=1;
}
Serial.println(tubeNum);
Serial.print(" ");
Serial.print(x);
}

void loop() {
// put your main code here, to run repeatedly:
keypad();
delay(1000);
}

//end

I would like to know why my code does not allow the values of the 5 button keypad to be incorporated in. I'm on a tight schedule and this has a very high percentage so I would be very thankful if anyone could give suggestions on how to improve it.

Thanks!

2 
int x = analogRead(A0);

Your problem is not so much with Arduinos, but with simple programming concepts.
Work through some of the examples in the IDE.

I'm on a tight schedule

Isn't that your problem?