C Sharp - Variables

Numbers

int a;

Declares an integer with a name of ‘a’. It must have a value.

int? b;

Introduced with C# 8.0

Declares an integer that can be null. This can be done with objects as well.

Strings

Checking for blanks

if (string.IsNullOrEmpty(code))
    return null;

Array of Strings

String[] weekDays = new string[3] {"Sun", "Mon", "Tue", "Wed"};

References

• https://stackoverflow.com/questions/7872633/most-advisable-way-of-checking-empty-strings-in-c-sharp - discussion of variable checking
• https://www.geeksforgeeks.org/c-sharp-arrays-of-strings/ - Array of Strings

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