Circular Left Shift Operation .

The following implementation in JAVA uses the magical modulo operator in order to find the index of the array location to copy.

 
public int[] nLeftShift( int[] data , int n){

        int N = data.length;   // Size of an Array
        n = n%N;                 // N shift operations means no shift operation.
       
        int[] data2 = new int[N];
       
        for(int i = 0; i< N ;i++){
            data2[i] = data[(i+n)%N];
        }
       
        return data2;
    }