I tried the Arduino button, but when compiling it, it sends me the below attached message.
Can someone help me with this?
Thanks and regards.
Arduino:1.8.1 (Windows 8.1), Tarjeta:"Arduino/Genuino Uno"
C:\Users\JUAN\Documents\Arduino\pushbottom-1\pushbottom-1.ino\pushbottom-1.ino.ino: In function 'void setup()':
pushbottom-1.ino:3: error: 'ledPin' was not declared in this scope
pinMode(ledPin, OUTPUT);
^
pushbottom-1.ino:5: error: 'buttonPin' was not declared in this scope
pinMode(buttonPin, INPUT);
^
C:\Users\JUAN\Documents\Arduino\pushbottom-1\pushbottom-1.ino\pushbottom-1.ino.ino: In function 'void loop()':
pushbottom-1.ino:10: error: 'buttonState' was not declared in this scope
buttonState = digitalRead(buttonPin);
^
pushbottom-1.ino:10: error: 'buttonPin' was not declared in this scope
buttonState = digitalRead(buttonPin);
^
pushbottom-1.ino:16: error: 'ledPin' was not declared in this scope
digitalWrite(ledPin, HIGH);
^
pushbottom-1.ino:19: error: 'ledPin' was not declared in this scope
digitalWrite(ledPin, LOW);
^
exit status 1
'ledPin' was not declared in this scope
Post your code: you probably made a simple typo.
Guessing you might have declared ledpin and buttonpin with small "p" not "P"?
manor_royal:
you probably made a simple typo.
Looking at the title I would say you're right 
This is the program as shown on the arduino page.
And it does not work, can you help me?
Thanks and regards
void setup() {
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
}
void loop() {
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);
// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH:
if (buttonState == HIGH) {
// turn LED on:
digitalWrite(ledPin, HIGH);
} else {
// turn LED off:
digitalWrite(ledPin, LOW);
}
}
On which page?
Anyway there should be something like
int ledPin = 13;
int buttonPin =2;
before the setup() on the page that you are referring to.
JUANSOSAM:
This is the program as shown on the arduino page.
There is no such thing as the arduino page. The Arduino website has many many pages... So which one?
JUANSOSAM:
And it does not work, can you help me?
Of course it doesn't. I doubt that was the whole program... How is the IDE to know what you mean with buttonPin?
And please have a look at How to use this forum. That would have told you to use code tags and to post the code in the first place 
This page?
Look again.....
You left a bit out, as sterretje predicted.
copy / paste can be difficult
OP, If you go File > Examples > Digital in the IDE you don't even need to copy & paste the code.