This is very similar to the while loop except that the test occurs at the end of the loop body. This guarantees that the loop is executed at least once before continuing. Such a setup is frequently used where data is to be read. The loop is used to re-read the data if the first set was unacceptable.
do
{ printf("Enter 1 for yes, 0 for no :");
scanf("%d", &input_value);
} while (input_value != 1 && input_value != 0)