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What is the difference between a lambda expression and a predicate in .NET?
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Predicate<T> is a generic functional interface that represents a single argument function that returns a boolean value (true or false). This interface available in java. util. function package and contains a test(T t) method that evaluates the predicate of a given argument.
Predicate in general meaning is a statement about something that is either true or false. In programming, predicates represent single argument functions that return a boolean value.
You use a lambda expression to create an anonymous function. Use the lambda declaration operator => to separate the lambda's parameter list from its body. A lambda expression can be of any of the following two forms: Expression lambda that has an expression as its body: C# Copy.
The difference between a statement and an expression lambda is that the statement lambda has a statement block on the right side of the lambda operator, whereas the expression lambda has only an expression (no return statement or curly braces, for example).
A predicate is delegate (function object) that returns a boolean value. Lambda expressions can be used to define any anonymous function, which includes predicates, e.g. to express a predicate in the form of a lambda expression:
Predicate<int> isEven2 = x => x % 2 == 0;
which is functionally equivalent to:
Func<int,bool> isEven = x => x % 2 == 0;
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