Composite formatting in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print the name using composite formatting.

C Sharp (C#)

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

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

A"{0}"

B"{name}"

C"name"

D"{}"

Attempts:

3 left

💡 Hint

Common Mistakes

Using the variable name inside the string without braces.

Using empty braces {} which is invalid in C# composite formatting.

Composite formatting uses placeholders like {0} to insert values.

2fill in blank

medium

Complete the code to print the age using composite formatting.

C Sharp (C#)

int age = 30;
Console.WriteLine("Age: [1]", age);

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

A"{age}"

B"{1}"

C"{}"

D"{0}"

Attempts:

3 left

💡 Hint

Common Mistakes

Using {1} when there is only one argument.

Using variable names inside braces which is not supported in composite formatting.

The placeholder {0} refers to the first argument after the format string.

3fill in blank

hard

Fix the error in the composite formatting to print both name and age.

C Sharp (C#)

string name = "Bob";
int age = 25;
Console.WriteLine("Name: [1], Age: {1}", name, age);

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

A"{name}"

B"{}"

C"{0}"

D"{2}"

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names inside braces instead of numbers.

Using {2} when only two arguments are provided.

Use {0} for the first argument and {1} for the second argument in composite formatting.

4fill in blank

hard

Fill both blanks to format a floating number with 2 decimal places and align it right in 10 spaces.

C Sharp (C#)

double price = 123.456;
Console.WriteLine("Price: [1], Total: [2]", price, price * 2);

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

A"{0,10:F2}"

B"{0:F2}"

C"{1,10:F2}"

D"{1:F2}"

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong indexes for placeholders.

Omitting alignment or format specifier.

Use {index,width:format} to align and format numbers. {0,10:F2} means first argument, right aligned in 10 spaces with 2 decimals.

5fill in blank

hard

Fill all three blanks to print a formatted string with name uppercase, age, and balance with currency format.

C Sharp (C#)

string name = "Carol";
int age = 40;
double balance = 1234.5;
Console.WriteLine("Name: [1], Age: [2], Balance: [3]", name.ToUpper(), age, balance);

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

A"{0}"

B"{1}"

C"{2:C}"

D"{0:C}"

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up argument indexes.

Forgetting the currency format specifier.

Use {0} for first argument (name uppercase), {1} for age, and {2:C} to format balance as currency.