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error: 'variable' was not declared in this scope
Arduino IDE shows an error:
C:\Users\Documents\Arduino\Code\Code.ino: In function 'void setup()':
Code:3:2: error: 'myVal' was not declared in this scope
myVal = 5;
^~~~~
exit status 1
'myVal' was not declared in this scope
My code is:
void setup() {
// put your setup code here, to run once:
myVal = 5;
}
void loop() {
// put your main code here, to run repeatedly:
}
How can I solve it?
Answer
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:
}
See global variable vs local variable
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