problems with liquid crystal

Using Arduino Programming Questions
1

hi, yesterday i prepared a liquid crystal display set, managed to connect it right but, for some reasons my display doesen't work, i doubled checked if i had everything setted right, and it was done right, so i guess the problem is in the code

anyone can help

#include<LiquidCrystal.h>
LiquidCrystal lcd(12,11,5,4,3,2);
const int switchPin= 6;
int switchState= 0;
int prevSwitchState=0 ;
int reply;
void setup() {
lcd.begin(16,2);
pinMode(switchPin,INPUT);
lcd.print("will you lose?");
lcd.setCursor(0,1);
lcd.print("or will you win?");


}

void loop() {
switchState = digitalRead(switchPin);
if (switchState !=prevSwitchState);{
if (switchState == LOW); {
reply = random(2);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("hai");
lcd.setCursor(0,1);
switch (reply) {
 case 0:
 lcd.print ("you lost.");
 break;
 case 1:
 lcd.print ("you won!");
 
}
}}
prevSwitchState = switchState;
2 
if (switchState !=prevSwitchState);{
if (switchState == LOW); {

If statements do NOT end with semicolons.

Put the { on a new line.

}}

ONE curly brace per line.

If your display does not work, why did you write so much code that expects it to work?

Did you try any of the examples that came with the LiquidCrystal library?

3

managed to connect it right

Perhaps not, but forum members are not in a position to guess, because you forgot to post the information.