error: 'variable' was not declared in this scope

This is a common mistake for beginners who just got started to learn programming.

It is very easy to solve. You just need to declare variable by one of two following ways:

Declare a variable as a global variable. int myVal; void setup () < // put your setup code here, to run once: myVal = 5; >void loop () < // put your main code here, to run repeatedly: > Declare a variable as a local variable. void setup () < // put your setup code here, to run once: int myVal = 5; >void loop () < // put your main code here, to run repeatedly: >

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error: 'variable' was not declared in this scope

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