Assignment and compound assignment in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to assign the value 10 to the variable number.

C Sharp (C#)

int number [1] 10;

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

A=

B==

C+=

D=>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' instead of '=' causes a syntax error.

Using '+=' without initializing the variable first.

The single equal sign = is used to assign a value to a variable in C#.

2fill in blank

medium

Complete the code to add 5 to the variable score using a compound assignment operator.

C Sharp (C#)

score [1] 5;

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

A*=

B+=

C-=

D=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' only replaces the value instead of adding.

Using '-=' subtracts instead of adding.

The += operator adds the right value to the variable and assigns the result back to it.

3fill in blank

hard

Fix the error in the code to multiply count by 3 using a compound assignment.

C Sharp (C#)

count [1] 3;

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

A*=

B==

C=

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using '*' alone causes a syntax error.

Using '=' only assigns without multiplying.

The *= operator multiplies the variable by the value and assigns the result back to it.

4fill in blank

hard

Complete the code: first initialize value to 2, then subtract 2 from it using a compound assignment operator.

C Sharp (C#)

value [1] 2;
value [2] 2;

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

A-=

B=

C+=

D*=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '+=' instead of '-=' for subtraction.

Using '=' for both lines causes no subtraction.

First, we assign the value 2 to value using =. Then, we subtract 2 from value using the compound assignment -=.

5fill in blank

hard

Fill all three blanks to add each word to the dictionary `lengths` mapping it to its length, but only if the length is greater than 3. Assume `word` is a string variable in scope.

C Sharp (C#)

var lengths = new Dictionary<string, int>();
if ([1] > 3) {
    lengths[[2]] = [3];
}

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

A"word"

B"word".Length

Cword.Length

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using quoted strings instead of the variable word for keys.

Forgetting to use word.Length and using a string literal.

Check if word.Length > 3. If so, set lengths[word] = word.Length.