All TestCase pass, but not sure my approach is correct or not. So kindly review my code

#1

Scanner scn = new Scanner(System.in);
String in = scn.next();

	difference(in);
	
}

static void  difference(String in) {
	
	
	int len = in.length();
	int i =1;
	while(i<=len-1) {
	
	

		int b = (int)in.charAt(i-1);
		int c = (int)in.charAt(i);
		int a = c-b;
		
		
		
		char ch = in.charAt(i-1);
		
		String sdas = Character.toString(ch);
		
		
		
		
		
		System.out.print(sdas+a);
		
		
		
		i++;
	}
	char last = in.charAt(len-1);
	String sdass =  Character.toString(last);
	
	System.out.print(sdass);
}

}

#2

Yes, @k.bhupenderagile your approach is correct.

#3

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