What is the default boolean value in C

Question

A boolean  bool  can t be null  And   bool foo  if foo       Use of unassigned local variable  foo    Why the default value is not false  So what is the value if it is not null  What is the reason   Edit 1 - The default value is indeed false - but all variable should be initialized  why  this is for another question      Edit 2 - with Resharper   private bool foo   false     Initializing field by default value is redundant

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It can be treated as defensive programming approach from the compiler - the variables must be assigned before it can be used

User · Answer

Try this  using default keyword    bool foo   default bool   if  foo

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http   msdn microsoft com en-us library 83fhsxwc aspx     Remember that using uninitialized variables in C  is not allowed    With   bool foo   new bool      foo will have the default value   Boolean default is false

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The default value for bool is false  See this table for a great reference on default values  The only reason it would not be false when you check it is if you initialize set it to true

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The default value is indeed false   However you can t use a local variable is it s not been assigned first   You can use the default keyword to verify   bool foo   default bool   if   foo    Console WriteLine  Default is false

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Basically local variables aren t automatically initialized  Hence using them without initializing would result in an exception   Only the following variables are automatically initialized to their default values    Static variables Instance variables of class and struct instances Array elements   The default values are as follows  assigned in default constructor of a class     The default value of a variable of reference type is null  For integer types  the default value is 0 For char  the default value is   u0000  For float  the default value is 0 0f For double  the default value is 0 0d For decimal  the default value is 0 0m For bool  the default value is false For an enum type  the default value is 0 For a struct type  the default value is obtained by setting all value type fields to their default values   As far as later parts of your question are conerned    The reason why all variables which are not automatically initialized to default values should be initialized is a restriction imposed by compiler  private bool foo   false  This is indeed redundant since this is an instance variable of a class  Hence this would be initialized to false in the default constructor  Hence no need to set this to false yourself

[c#] What is the default boolean value in C#?

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