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Empty message is not printed

suggest change

When NSLog is asked to print empty string, it omits the log completely. 

NSString *name = @"";
NSLog(@"%@", name);  // Resolves to @""

The above code will print nothing.

It is a good practice to prefix logs with labels: 

NSString *name = @"";
NSLog(@"Name: %@", name);  // Resolves to @"Name: "

The above code will print: 

2016-07-21 14:20:28.623 App[87711:6153103] Name:
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Logging:
* Logging
* Logging
* NSLog Output Format
* Logging Variable Values
* Removing Log Statements from Release Builds
* Empty message is not printed
* Using FUNCTION
* NSLog vs printf
* Logging NSLog meta data
* NSLog and BOOL type
* Logging by Appending to a File
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