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Reference and dereference operator in Arduino
The reference (&) and dereference operators (*) in Arduino are similar to C. Referencing and dereferencing are used with pointers.
If x is a variable, then its address is represented by &x.
Similarly, if p is a pointer, then the value contained in the address pointed to by p is represented by &p.
Example
void setup() { // put your setup code here, to run once: Serial.begin(9600); Serial.println(); int x = 10; int *p; p = &x; //p now contains the address of x Serial.print("The value stored in the address pointed by p is: ");Serial.println(*p); } void loop() { // put your main code here, to run repeatedly: }
Output
The Serial Monitor output is −
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