Check if a number is jumbled or not in C++

Here we will see one interesting problem to check whether a number is jumbled or not. A number is said to be jumbled if, for every digit, it's neighbor digit differs by max 1. For example, a number 1223 is jumbled, but 1256 is not jumbled.

To solve this problem, we have to check if a digit has a neighbor with a difference greater than 1. If such digit is found, then return false, otherwise true.

Example

 Live Demo

#include <iostream>
#include <cmath>
using namespace std;
bool isJumbled(int number) {
   if (number / 10 == 0) //for single digit number is is always jumbled
      return true;
   while (number != 0) {
      if (number / 10 == 0) //when all digits have checked, return true
         return true;
      int curr_digit = number % 10;
      int prev_digit = (number / 10) % 10;
      if (abs(prev_digit - curr_digit) > 1)
         return false;
      number = number / 10;
   }
   return true;
}
int main() {
   int n = 1223;
   if(isJumbled(n)){
      cout << n << " is Jumbled";
   } else {
      cout << n << " is not Jumbled";
   }
}

Output

1223 is Jumbled