| . (dot) #include setup() void /* */ (multiline comment) false true // (comment) , (comma) {} (curly braces) CHANGE FALLING HIGH INPUT loop() LOW LSBFIRST MSBFIRST null OUTPUT RISING ; (semicolon) [] (array access) () (parentheses) return = (assign) Primitive int unsigned int long unsigned long char unsigned char float double boolean byte array Composite String Conversion boolean() byte() char() int() long() float() Bit, byte and word handling bit() bitRead() bitWrite() lowByte() highByte() makeWord() Relational Operators < (less than) >= (greater than or equal to) == (equality) <= (less than or equal to) > (greater than) != (inequality) Iteration for() while() Conditionals break switch() case else if() Logical operators || (logical OR) && (logical AND) ! (logical NOT) Bitwise operators | (bitwise OR) |= (bitwise OR and assign) & (bitwise AND) &= (bitwise AND and assign) ^ (bitwise XOR) ~ (bitwise one´s complement) << (bitwise bit shift left) >> (bitwise bit shift right) | Pin Digital I/O pinMode() digitalRead() digitalWrite() Port Digital I/O portMode() portRead() portWrite() Pin Analog Input analogRead() Pin PWM (Analog) Output analogWrite() Time delay() delayMicroseconds() millis() Pulse Input (polled) pulseIn() Pulse output generation pulseOut() pulseRunning() pulseStop() Advanced Output shiftOut() External Interrupts attachInterrupt() detachInterrupt() interruptMode() Interrupts interrupts() noInterrupts() | Operators -= (subtract assign) + (addition) - (minus) % (modulo) += (add assign) / (divide) * (multiply) ++ (increment) -- (decrement) Calculation min() max() round() pow() floor() sqrt() abs() constrain() sq() ceil() map() Trigonometry tan() sin() cos() degrees() atan2() radians() Random randomSeed() random() HALF_PI ( 1.57079... ) TWO_PI ( 6.28318... ) PI ( 3.14159... )