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Is there any difference between the return value and no return value of the master definition function??

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It is generally customary to add return values such as return FALSE. To make sure that the program failed to invoke success.
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Look at this person, but generally a function is to process data or other, there will be a return value, even if there is no specific data returned, will also return a true or false, to confirm that the function is executed successfully
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If there is a return value, you can use the return value to determine the result of your function's processing.
For example, inserting a piece of data, is the insertion successful? The return value can help you to judge and give the correct handling and hints in the subsequent program.
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The general execution is to have the return value, either return the specific data or Boolean value, the Boolean value can be used for the next judgment

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