Lambda Expressions in C sharp

Definition and Use of Lambda Expressions in C# .Net

 

Lambda Expressions

 delegate int Increment(int v);

// Declare a delegate that takes an int argument
// and returns a bool result.
delegate bool IsEven(int v);
class SimpleLambdaDemo
{
  static void Main()
  {
    // Create an oIncrement delegate instance that refers to
    // a lambda expression that increases its parameter by 2.
    Increment oIncrement = count => count + 2;
    // Now, use the oIncrement lambda expression.
    Console.WriteLine("Use oIncrement lambda expression: ");
    int iIndex = -10;
    while(iIndex <= 0)
    {
      Console.Write(iIndex + " ");
      iIndex = oIncrement(iIndex); // increase x by 2
    }
    Console.WriteLine("\n");
    // Create an IsEven delegate instance that refers to
    // a lambda expression that returns true if its parameter
    // is even and false otherwise.
    IsEven oIsEven = n => n % 2 == 0;
    // Now, use the oIsEven lambda expression.
    Console.WriteLine("Use oIsEven lambda expression: ");
    for(int i = 1; i <= 10; i++)
    {
      if(oIsEven(i)) Console.WriteLine(i + " is even.");
    }
  }
}

The output is shown here:
Use oIncrement lambda expression:
-10 -8 -6 -4 -2 0
Use oIsEven lambda expression:
2 is even.
4 is even.
6 is even.
8 is even.
10 is even.

Statement Lambda

Definition and Use of LambdaExpressions in C# sharp dot net, real world scenarios and live code example forlambda expressions,  introduction to lambda expressions in C# sharp