Can i connect in pin of relay module to Analog pins of arduino instead of digital pin? Im a complete beginner
Im making a project using relay modules and arduino. but all the digital pins of my arduino are filled.
I wanted to ask if i can use the analog pins to connect my relay module to my arduino? If yes can anyone give me the statements to write high and low using analog.
Yes, you can  use the analog pins as digital pins.
Quoting this Arduino tutorial:
pinMode(A0, OUTPUT);
digitalWrite(A0, HIGH);

EDIT:
Here is the code snippet for digital input:
pinMode(A0, INPUT);
digitalRead(A0);