Can somebody please help me or tell me how to write functions in java.

Another name for function in Java is a method. in other words a Method is like a Function.

have you written a simple program in java ??? if yes ... then public static void main (String [] args) is a function ... in java a function is called a method ... you can write a method like this :

public void methodName(in a, double b){
}

where void is the return type and a and b are the passing parameters.

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