private void swithchoice(int i)
	{
		System.out.println("you entered " + i);
		
		switch(i)
		{
		case 1:
			
			System.out.println("enter number of index");
			int ond = input.nextInt();
			oneDim = new String[ond];
			// here we are initialising the variable, and giving it number of index; 
			break;
			
		case 2:
			
			System.out.println("enetr index numbers");
			int two1 = input.nextInt();
			System.out.println("next one");
			int two2 = input.nextInt();
			twoDim = new String[two1][two2];
			break;
			
		case 3:
			
			System.out.println("enetr the number ");
			numberb = input.nextInt();
			System.out.println("enter number of power of");
			int pwr1 = input.nextInt();
			powerf = new int[pwr1];
			break;
			
		default:
			System.out.println("error");
			break;
		}
	}