Func delegate type in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a Func delegate that takes two integers and returns an integer.

C Sharp (C#)

Func<int, int, [1]> add = (x, y) => x + y;

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Aint

Bvoid

Cstring

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Using void as return type in Func (Func must return a value).

Using string or bool as return type when adding integers.

The Func delegate's last type parameter specifies the return type. Here, it returns an int.

2fill in blank

medium

Complete the code to declare a Func delegate that takes a string and returns its length.

C Sharp (C#)

Func<string, [1]> getLength = s => s.Length;

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Aint

Bstring

Cbool

Ddouble

Attempts:

3 left

💡 Hint

Common Mistakes

Using string as return type instead of int.

Using bool or double which do not match Length property type.

The Func delegate returns the length of the string, which is an int.

3fill in blank

hard

Fix the error in the Func delegate declaration to correctly return a boolean indicating if a number is even.

C Sharp (C#)

Func<int, [1]> isEven = n => n % 2 == 0;

Drag options to blanks, or click blank then click option'

Astring

Bbool

Cint

Dvoid

Attempts:

3 left

💡 Hint

Common Mistakes

Using int as return type when the lambda returns a boolean.

Using void which is invalid for Func delegates.

The lambda returns a boolean value, so the Func delegate must have bool as the return type.

4fill in blank

hard

Fill both blanks to declare a Func delegate that takes a double and an int, and returns a double result.

C Sharp (C#)

Func<[1], [2], double> multiply = (a, b) => a * b;

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Adouble

Bint

Cstring

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping input types or using string/bool as input types.

Using int as first input when it should be double.

The Func delegate takes a double and an int as inputs and returns a double.

5fill in blank

hard

Fill all three blanks to declare a Func delegate that takes two strings and returns a boolean indicating if they are equal.

C Sharp (C#)

Func<[1], [2], [3]> areEqual = (s1, s2) => s1 == s2;

Drag options to blanks, or click blank then click option'

Astring

Bint

Cbool

Ddouble

Attempts:

3 left

💡 Hint

Common Mistakes

Using int or double as input types instead of string.

Using int or string as return type instead of bool.

The Func delegate takes two string inputs and returns a bool indicating equality.