A lambda expression is one kind of anonymous function, which means it doesn't have a name attached to it. But if we want to create a function which can be called, we can use the fun keyword with a lambda expression. We can pass the input parameter in the lambda function, which is created using the fun keyword. This function is quite similar to a normal F# function. Let's see a normal F# function and a lambda function:
// Normal F# functionlet addNumbers a b = a+b// Evaluating valueslet sumResult = addNumbers 5 6 // Lambda function and evaluating valueslet sumResult = (fun (a:int) (b:int) -> a+b) 5 6// Both the function will return value sumResult = 11
