Keyestudio Basic starter kit, Manual, Page: 27 / 109

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}
void loop()
{
val=digitalRead(inpin);// read the level value of pin 7 and assign if to val
if(val==LOW)// check if the button is pressed, if yes, turn on the LED
{ digitalWrite(ledpin,LOW);}
else
{ digitalWrite(ledpin,HIGH);}
}
//////////////////////////////////////////////////////////
Result
When the button is pressed, LED is on, otherwise, LED remains off. After the above process, the
button controlled LED experiment is completed. The simple principle of this experiment is widely
used in a variety of circuit and electric appliances. You can easily come across it in your every day life.
One typical example is when you press a certain key of your phone, the backlight will be on.