Sentinel: Sentinel is a special value that is used to stop the sequence of series when there is no indication of explicit size. • It is also called as “flag value” or “dummy value” created in the algorithm to terminate the program . • The sentinel value must be a distinct value from the other data values, so that it is guaranteed to end the data. ○ For example: “null character” is used to end the null terminated string and a “negative integer” is used to indicate the end of sequence for non-negative integers.

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Chapter 4, Problem 6SA

Program Plan Intro

Sentinel:

Sentinel is a special value that is used to stop the sequence of series when there is no indication of explicit size.

• It is also called as “flag value” or “dummy value” created in the algorithm to terminate the program.

• The sentinel value must be a distinct value from the other data values, so that it is guaranteed to end the data.

○ For example: “null character” is used to end the null terminated string and a “negative integer” is used to indicate the end of sequence for non-negative integers.

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