Format specifiers for numbers and dates in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to format the number as currency.

C Sharp (C#)

double price = 1234.56;
string formatted = price.ToString("[1]");
Console.WriteLine(formatted);

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

AD

BC

CF

DN

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'D' which is for decimal integers, not currency.

Using 'F' which formats as fixed-point number without currency symbol.

The format specifier C formats the number as currency.

2fill in blank

medium

Complete the code to format the date as year-month-day.

C Sharp (C#)

DateTime today = new DateTime(2024, 6, 15);
string formatted = today.ToString("[1]");
Console.WriteLine(formatted);

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

AMM/dd/yyyy

Bdd-MM-yyyy

Cyyyy-MM-dd

DMMMM dd, yyyy

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'MM/dd/yyyy' which formats as month/day/year.

Using 'dd-MM-yyyy' which puts day first.

The format specifier yyyy-MM-dd formats the date as year-month-day.

3fill in blank

hard

Fix the error in the code to format a number with two decimal places.

C Sharp (C#)

double value = 3.14159;
string result = value.ToString("[1]");
Console.WriteLine(result);

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

AF2

BN

CD2

DC2

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'D2' which is for decimal integers, not floating numbers.

Using 'N' without specifying decimals may show default decimals.

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

4fill in blank

hard

Fill both blanks to format the date as full month name and 24-hour time.

C Sharp (C#)

DateTime dt = new DateTime(2024, 6, 15, 18, 30, 0);
string formatted = dt.ToString("[1] [2]");
Console.WriteLine(formatted);

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

AMMMM

BHH:mm

Chh:mm tt

Dddd

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'hh:mm tt' which is 12-hour time with AM/PM.

Using 'ddd' which shows abbreviated day name.

MMMM shows the full month name, and HH:mm shows 24-hour time with minutes.

5fill in blank

hard

Fill all three blanks to create a dictionary with word lengths for words longer than 3 letters.

C Sharp (C#)

string[] words = {"apple", "bat", "carrot", "dog"};
var lengths = new Dictionary<string, int>()
{
    {"[1]", [2]
};

foreach (var word in words)
{
    if (word.Length [3] 3)
    {
        lengths[word] = word.Length;
    }
}

foreach (var kvp in lengths)
{
    Console.WriteLine($"{kvp.Key}: {kvp.Value}");
}

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

Aword

Bword.Length

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' which selects words shorter than 3 letters.

Using 'word.Length' as key which is incorrect.

The dictionary key is the word (word), the value is its length (word.Length), and the condition checks if length is greater than 3 (>).