# How to rotate the element of the array with a given input n, where ‘n’ is the number of rotation

Rotate the element of the array with a given input, the following program able to rotate the array to the left side as a given number of 'n', n means how many elements will be rotated to the left side

## Java Program Code :

/*;==========================================
; Title:  Rotate Array to the left  ( n - rotate )
; Author: codenaive littleboy8506@  <[email protected]> <[email protected]>
; Date:   29 Dec 2020
;==========================================*/

class arrayOperation{
int data[]; // actual array data;
int length; // length of array data
public arrayOperation(String s){
String d[] =s.split(",");  // split the string into array
length=d.length; // calculating the array length;
data = new int[length];	// set the length of array;

// store the value of string data into int array .
for(int i=0;i<length;i++){
data[i]=Integer.parseInt(d[i].trim());
}

}
public void  display(){
System.out.print("\t");
for(int i=0;i<length;i++){
System.out.print(data[i]+" ");
// display the data of array.
}
}
public void rotateLeft(int n){

for(int i = 0; i<n;i++){
int j, first_data;
// store the first element to add at the end of array in one iteration.
first_data=data[0];

// if i=0 means the array will shift left by one value, similarly so on for i=0,1,2.
for(j=0; j < length-1;j++){
data[j]=data[j+1];
}
// append the value of first at the end of array.
data[j]=first_data;
}

}

}
class Rotate {
public static void main(String args[]){
// here set the rotate vale to left.
int n=3;  // rotation Value

// create  object and pass the array value.
arrayOperation obj = new arrayOperation("1,2,3,4,5,6,7,8");  // input here

// Before rotation of array.
System.out.println("\nOriginal Array : ");
obj.display();

// After rotation of array.
System.out.println("\nAfter Roate Left  : ");
obj.rotateLeft(n);
obj.display();

}

}

## Output:

C:\Codenaive>javac Rotate.java

C:\Codenaive>java Rotate

Original Array :
1 2 3 4 5 6 7 8
After Rotate Left  :
4 5 6 7 8 1 2 3