compile error

i m interfacing 4 button to arduino uno with 4 LED respective. My program as follow:-

const int buttonPin1 = 2; // the number of the pushbutton pin
const int buttonPin2 = 3;
const int buttonPin3 = 4;
const int buttonPin4 = 5;
const int ledPin1 = 6; // the number of the LED pin
const int ledPin2 = 7;
const int ledPin3 = 8;
const int ledPin4 = 9;
// variables will change:
int buttonState1 = 0; // variable for reading the pushbutton status
int buttonState2 = 0;
int buttonState3 = 0;
int buttonState4 = 0;

void setup() {
// initialize the LED pin as an output:
pinMode(ledPin1, OUTPUT);
pinMode(ledPin2, OUTPUT);
pinMode(ledPin3, OUTPUT);
pinMode(ledPin4, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(buttonPin1, INPUT);
pinMode(buttonPin2, INPUT);
pinMode(buttonPin3, INPUT);
pinMode(buttonPin4, INPUT);
}

void loop() {
// read the state of the pushbutton value:
buttonState1 = digitalRead(buttonPin1);
buttonState2 = digitalRead(buttonPin2);
buttonState3 = digitalRead(buttonPin3);
buttonState4 = digitalRead(buttonPin4);

// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH:
if (buttonState1 == HIGH) {
// turn LED on:
digitalWrite(ledPin1, HIGH);
}
else if(buttonstate2 == HIGH)
{
// turn LED on:
digitalWrite(ledPin2, HIGH);
}
else if(buttonstate3 ==HIGH)
{
// turn LED on:
digitalWrite(ledPin3, HIGH);
}
else if(buttonstate4 ==HIGH)
{
// turn LED on:
digitalWrite(ledPin4, HIGH);
}

}

I am getting error as below:-
C:\Users\Admin\Documents\Arduino\sketch_aug28a\Button\Button.ino: In function 'void loop()':

Button:71: error: 'buttonstate2' was not declared in this scope

else if(buttonstate2 == HIGH)

^

Button:76: error: 'buttonstate3' was not declared in this scope

else if(buttonstate3 ==HIGH)

^

Button:81: error: 'buttonstate4' was not declared in this scope

else if(buttonstate4 ==HIGH)

^

exit status 1
'buttonstate2' was not declared in this scope

the variable names are case sensitive...

buttonstate2 is not the same as buttonState2
buttonstate3 is not the same as buttonState3
buttonstate4 is not the same as buttonState4

also PLEASE in the future (you can still fix your post above and re-edit it) add the code tags around your code so that code looks like this (edit, select your code and press the </> icon and save.)

  if (buttonState1 == HIGH) {
    // turn LED on:
    digitalWrite(ledPin1, HIGH);
  } 
  else if(buttonstate2 == HIGH)
  {
    // turn LED on:
    digitalWrite(ledPin2, HIGH);
  } 
  else if(buttonstate3 ==HIGH)
  {
    // turn LED on:
    digitalWrite(ledPin3, HIGH);
  }  
  else if(buttonstate4 ==HIGH)
  {
    // turn LED on:
    digitalWrite(ledPin4, HIGH);
  }

hopefully you understand that if button1 is pressed then because of the else statements you won’t check the other buttons, right?
and you know that there is no way to turn off a LED once you turned it on?

Thnks friend