Form f = null; if (f != null && f.Width > 10) { }
if
bool T(){Console.WriteLine(" TRUE");return true;}bool F(){Console.WriteLine(" FALSE");return false;}void Main(){ Console.WriteLine("T & F = {0}\n", T() & F()); Console.WriteLine("T && F = {0}\n", T() && F()); Console.WriteLine("F & T = {0}\n", F() & T()); Console.WriteLine("F && T = {0}\n", F() && T()); Console.WriteLine("T | F = {0}\n", T() | F()); Console.WriteLine("T || F = {0}\n", T() || F()); Console.WriteLine("F | T = {0}\n", F() | T()); Console.WriteLine("F || T = {0}\n", F() || T());}
TRUE FALSET & F = False TRUE FALSET && F = False FALSE TRUEF & T = False FALSEF && T = False TRUE FALSET | F = True TRUET || F = True FALSE TRUEF | T = True FALSE TRUEF || T = True
var
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