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package javao.n;

public class JavaoN {

    public static void main(String[] args) 
    {
        int [] array = {1,2,3,4,5,6,7,8,9,10}; 
        int sum = 0; 
        
        for (int i=0; i<array.length;i++)
        {
            sum += array[i]; 
        }
        System.out.println(sum);
    }
    
}

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for(int i = 1; i < n; i *= 2) {...}