This example is for Wiring version 0024+. If you have a previous version, use the examples included with your software. If you see any errors or have comments, please let us know.
Logical Operators.
The logical operators for AND (&&) and OR (||) are used to combine simple relational statements into more complex expressions. The NOT (!) operator is used to negate a boolean statement.
The logical operators for AND (&&) and OR (||) are used to combine simple relational statements into more complex expressions. The NOT (!) operator is used to negate a boolean statement.
int RED = 0; // red LED on digital pin 0 int BLUE = 1; // blue LED on digital pin 0 boolean op = false; void setup() { pinMode(RED, OUTPUT); pinMode(BLUE, OUTPUT); } void loop() { for(int i=5; i<=195; i+=5) { // Logical AND if((i > 35) && (i < 100)) { op = false; } // Logical OR if((i <= 35) || (i >= 100)) { op = true; } // Testing if a boolean value is "true" // The expression "if(op)" is equivalent to "if(op == true)" if(op) { digitalWrite(RED, LOW); digitalWrite(BLUE, HIGH); delay(200); // delay to visualize the LED change } // Testing if a boolean value is "false" // The expression "if(!op)" is equivalent to "if(op == false)" if(!op) { digitalWrite(RED, HIGH); digitalWrite(BLUE, LOW); delay(200); // delay to visualize the LED change } } }