Question

1. Consider the following code snippet. Identify the sentinel value.

         int number=0, sum = 0;
         while (number != -1){
   

                 cin >> number;
                 sum = sum + number;
   

   }

Can you solve this question? thanks (c++)

Answer 1

Sentinel value is a value which is used to terminate a loop.

For the given code above, you can see that in the while condition given is (number != -1)

This means as long as you keep on entering ny number other than -1.this while loop execution continuesly goes on and finds the sum of entered numbers.

When user Enters -1,then the While loop terminates and program execution goes out of the while loop.

So sentinal value here is -1

In the above picture you can see,as long any numbers except -1 were entered, while loop was getting executed.

When a -1 value is entered ,execution stops.