價值型別 - 布林

 placeholderCopy// default value of boolean is false
bool b;
//default value of nullable boolean is null
bool? z;
b = true;
if(b) {
    Console.WriteLine("Boolean has true value");
}

bool 關鍵字是 System.Boolean 的別名。它用於宣告變數以儲存布林值 truefalse