button pin error

Using Arduino Programming Questions
1 
Arduino: 1.8.12 (Windows Store 1.8.33.0) (Windows 10), Board: "Arduino Uno"

2.2:11:5: error: redefinition of 'int buttonPin'

 int buttonPin = 2;

     ^~~~~~~~~

C:\Users\xemnaxss\Documents\Arduino\edu\2.2\2.2.ino:10:5: note: 'int buttonPin' previously defined here

 int buttonPin = 1;

     ^~~~~~~~~

2.2:12:5: error: redefinition of 'int buttonPin'

 int buttonPin = 3;

     ^~~~~~~~~

C:\Users\xemnaxss\Documents\Arduino\edu\2.2\2.2.ino:10:5: note: 'int buttonPin' previously defined here

 int buttonPin = 1;

     ^~~~~~~~~

2.2:13:5: error: redefinition of 'int buttonPin'

 int buttonPin = 4;

     ^~~~~~~~~

C:\Users\xemnaxss\Documents\Arduino\edu\2.2\2.2.ino:10:5: note: 'int buttonPin' previously defined here

 int buttonPin = 1;

     ^~~~~~~~~

exit status 1
redefinition of 'int buttonPin'

This report would have more information with
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2

You can only specify the type on the initial declaration.

This works:

int buttonPin = 1; //original declaration sets variable to 1
buttonPin = 2; // now setting variable to 2

But this gives the error you see:
int buttonPin = 1;
int buttonPin = 2; // this line causes error

See the difference?

Suggest reviewing some basic programming tutorials to get used to the syntax and rules.

3

thanks