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while (x = x + 1)
                  while (n--)

                  while (count += i)
                  Program 4: To input any number and print it in reverse order using while loop. The input number
                  must be positive.
                  #include<iostream.h>

                  #include<conio.h>                                                        Output 1:
                                                                                           Enter  the  number  to  be
                  void main()
                                                                                           reversed: - 1543
                  {
                                                                                           The number must be positive
                        long int n = 0, digit;                                             Output 2:
                        cout<<”Enter the number to be reversed: “;                         Enter  the  number  to  be
                                                                                           reversed: 654321
                        cin>>n;
                                                                                           The  reverse  of  number
                        while (n <= 0)
                                                                                           654321 is: 123456
                        {
                             cout<< “The number must be positive \n”;

                             break;
                        }
                        cout<<”The reverse of number “ << n << “ is: “;

                        while (n != 0 && n>0)
                        {
                             digit = n % 10;

                             cout<<digit;
                             n = n / 10;
                        }

                        getch();
                  }

                      THE DO-WHILE LOOP

                  The do-while loop is similar to the while loop. The only difference is that with do-while loop,
                  the condition  is stated at the end of the loop. This ensures that the body of the loop executes at
                  least once. The syntax of the do-while loop is:

                  do
                  {

                  statements;
                  }

                  while (condition);





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