Example: To learn about variable number of arguments for a function

VariableNumberOfArgumentsDemo.java

/**
 * Example: To learn about variable number of arguments for a function
 * Varargs is a short name for variable arguments.
 * In Java, an argument of a method can accept arbitrary number of values.
 * This argument that can accept variable number of values is called varargs.
 * In order to define vararg, ... (three dots) is used in the formal parameter of a method.
 *
 * Note:
 * A method can have variable length parameters with other parameters too, but one should ensure that there exists only one varargs parameter that should be written last in the parameter list of the method declaration.
 * */
public class VariableNumberOfArgumentsDemo {
    public static void main(String[] args) {
        int ans;
        ans = sum(10,20,30,40);
        System.out.println(ans);
    }
    public  static int sum(int ... nums){
        int ans=0;
        for(int data:nums){
            ans+=data;
        }
        return  ans;
    }
}