Question mark and colon in statement What does it mean

Question

What do the question mark     and colon     mean    OperationURL 1      quot GET quot     GetRequestSignature      quot  quot    It appears in the following statement  string requestUri    apiURL    quot  e  quot    OperationURL 0      OperationURL 1      quot GET quot     GetRequestSignature      quot  quot

User · Answer

It is the ternary conditional operator   If the condition in the parenthesis before the   is true  it returns the value to the left of the    otherwise the value to the right

User · Answer

string requestUri    apiURL     e     OperationURL 0      OperationURL 1      GET     GetRequestSignature            can be translated to   string requestUri     if   OperationURL 1      GET         requestUri    apiURL     e     GetRequestSignature      else      requestUri    apiURL     e

User · Answer

This is the conditional operator expression    condition     true path     false path     For example    string value   someBooleanExpression    Alpha     Beta     So if the boolean expression is true  value will hold  Alpha   otherwise  it holds  Beta    For a common pitfall that people fall into  see this question in the C  tag wiki

User · Answer

It s a ternary operator  or the short form for if  else  condition   value if true   value if false See Microsoft Docs      operator  C  reference

User · Answer

This is also known as the  inline if   or as above the ternary operator  https   en wikipedia org wiki  3F   It s used to reduce code  though it s not recommended to use a lot of these on a single line as it may make maintaining code quite difficult  Imagine   a   b c  d e  f g h      and you could go on a while   It ends up basically the same as writing   if b    a   c  else if d    a   e  else if f    a   g  else   a   h    In your case   string requestUri    apiURL     e     OperationURL 0      OperationURL 1      GET     GetRequestSignature            Can also be written as   omitting the else  since it s an empty string   string requestUri    apiURL     e     OperationURL 0   if  OperationURL 1      GET       requestUri   requestUri   GetRequestSignature      or like this   string requestUri  if  OperationURL 1      GET       requestUri    apiURL     e     OperationURL 0    GetRequestSignature    else     requestUri    apiURL     e     OperationURL 0     Depending on your preference   the code style your boss tells you to use

User · Answer

It means if  OperationURL 1   evaluates to  GET  then return  GetRequestSignature    else return     I m guessing  GetRequestSignature    here returns a string  The syntax CONDITION   A   B basically stands for an if-else where A is returned when CONDITION is true and B is returned when CONDITION is false

User · Answer

In the particular case you ve provided  it s a conditional assignment  The part before the question mark     is a boolean condition  and the parts either side of the colon     are the values to assign based on the result of the condition  left side of the colon is the value for true  right side is the value for false

[c#] Question mark and colon in statement. What does it mean?

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