Why console IO is important in C Sharp (C#) - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print a message to the console.

C Sharp (C#)

Console.[1]("Hello, world!");

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

AWrite

BReadLine

CWriteLine

DRead

Attempts:

3 left

💡 Hint

Common Mistakes

Using ReadLine instead of WriteLine causes the program to wait for input.

Using Write prints without moving to a new line.

The WriteLine method prints the message and moves to the next line.

2fill in blank

medium

Complete the code to read a line of input from the user.

C Sharp (C#)

string input = Console.[1]();

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

AReadLine

BWriteLine

CWrite

DRead

Attempts:

3 left

💡 Hint

Common Mistakes

Using WriteLine instead of ReadLine causes no input to be read.

Using Read reads a single character, not a full line.

The ReadLine method reads a full line of text input from the user.

3fill in blank

hard

Fix the error in the code to correctly print the user's name.

C Sharp (C#)

Console.WriteLine("Hello, " + [1]);

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

Ainput

BConsole.ReadLine()

CConsole.WriteLine()

DConsole.Read()

Attempts:

3 left

💡 Hint

Common Mistakes

Using Console.ReadLine() inside WriteLine causes the program to wait for input again.

Using Console.WriteLine() inside WriteLine is incorrect syntax.

The variable input holds the user's name and should be used here.

4fill in blank

hard

Fill both blanks to read an integer from the user and print it.

C Sharp (C#)

int number = int.Parse(Console.[1]());
Console.[2]($"You entered: {number}");

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

AReadLine

BWriteLine

CWrite

DRead

Attempts:

3 left

💡 Hint

Common Mistakes

Using Read instead of ReadLine reads only one character.

Using Write instead of WriteLine does not move to a new line.

Use ReadLine to get input as text, then WriteLine to print the message.

5fill in blank

hard

Fill all three blanks to read two numbers, add them, and print the result.

C Sharp (C#)

int num1 = int.Parse(Console.[1]());
int num2 = int.Parse(Console.[2]());
int sum = num1 [3] num2;
Console.WriteLine($"Sum: {sum}");

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

AReadLine

B+

CRead

DWriteLine

Attempts:

3 left

💡 Hint

Common Mistakes

Using Read reads only one character, not the full number.

Using other operators like - or * will change the result.

Use ReadLine to read each number as text, then + to add them.