1 If you had the test to screen for colon cancer and you're at average risk â you have no colon cancer risk factors other than age â your doctor may recommend waiting one year and then repeating the test. 2  Positive result. 3  A fecal occult blood test is considered positive if blood is detected in your stool samples. A fecal occult blood test is considered positive if blood is detected in your stool samples. 2  You may need additional testing â such as a colonoscopy â to locate the source of the bleeding.
1 Note that we have to import java.util.InputMismatchException in order to use the InputMismatchException class.  We are using a while loop to ask the user the same question until the user enters the correct input.
In this case we will use a do-while loop like this. do { TakeInputFromUser() } while(input < 0) In this case we have to run loop at-least once because we want input from user at-least once. This loop will continue running until user enters a positive number.