String interpolation and formatting in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print the variable name using string interpolation.

C Sharp (C#)

string name = "Alice";
Console.WriteLine($"Hello, [1]!");

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

Auser

B"name"

CName

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Putting quotes around the variable name inside the braces, which prints the word instead of the value.

Using a different variable name that does not exist.

Using $"Hello, {name}!" inserts the value of the variable name into the string.

2fill in blank

medium

Complete the code to format the number score with two decimal places using string interpolation.

C Sharp (C#)

double score = 95.6789;
Console.WriteLine($"Score: [1]{score}");

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

A:F2

B:F1

C:N2

D:P2

Attempts:

3 left

💡 Hint

Common Mistakes

Using :F1 which shows only one decimal place.

Using :P2 which formats as percentage.

Using :N2 which adds commas but also shows decimals.

The format specifier :F2 formats the number with two decimal places.

3fill in blank

hard

Fix the error in the code to correctly align the text to the right with width 10 using string interpolation.

C Sharp (C#)

string word = "Hi";
Console.WriteLine($"[1],10}");

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

A"word"

Bword

CWord

Dword.ToString()

Attempts:

3 left

💡 Hint

Common Mistakes

Putting quotes around the variable name, which prints the word 'word' instead of the variable value.

Using a capitalized variable name that does not exist.

Inside the braces, use the variable name word without quotes to align it right with width 10.

4fill in blank

hard

Fill both blanks to create a formatted string that shows the price with 2 decimals and left-aligns the item in 15 spaces.

C Sharp (C#)

string item = "Apple";
double price = 1.2345;
string output = $"[1],-15} costs [2]:F2}";

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

Aitem

Bprice

Citem.ToUpper()

Dprice.ToString()

Attempts:

3 left

💡 Hint

Common Mistakes

Using price in the first blank which is a number, not a string.

Using item.ToUpper() which changes the text but is not required.

Using price.ToString() which is unnecessary inside interpolation.

Use item with ,-15 to left-align and price with :F2 to format decimals.

5fill in blank

hard

Fill all three blanks to create a string that shows the uppercase city, the temperature with 1 decimal, and the unit symbol.

C Sharp (C#)

string city = "Paris";
double temperature = 23.456;
string unit = "°C";
string report = $"[1]: [2]:F1}[3]";

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

Acity.ToUpper()

Btemperature

Cunit

Dcity

Attempts:

3 left

💡 Hint

Common Mistakes

Using city instead of city.ToUpper() for uppercase.

Putting quotes around variables inside braces.

Not formatting the temperature to one decimal.

Use city.ToUpper() for uppercase city, temperature with :F1 for one decimal, and unit for the symbol.