The do while Loop
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.
do
{
printf("Enter 1 for yes, 0 for no :");
scanf("%d", &input_value);
}
While (input_value != 1 && input_value != 0)