Methods that operate on state in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a method that changes the value of the field.

C Sharp (C#)

class Counter {
    private int count = 0;
    public void [1]() {
        count++;
    }
}

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

AIncrement

BGetCount

CReset

DDisplay

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method name that does not describe changing the state, like GetCount.

The method name Increment clearly shows it increases the count field by one.

2fill in blank

medium

Complete the method to reset the count field to zero.

C Sharp (C#)

class Counter {
    private int count = 0;
    public void Reset() {
        count [1] 0;
    }
}

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A=

B==

C+=

D++

Attempts:

3 left

💡 Hint

Common Mistakes

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

Using '+=' or '++' changes the value incorrectly.

The assignment operator = sets the count field to zero.

3fill in blank

hard

Fix the error in the method that returns the current count.

C Sharp (C#)

class Counter {
    private int count = 0;
    public int GetCount() {
        return [1];
    }
}

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ACount

Bthis.count()

CgetCount

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase 'Count' which is undefined.

Trying to call count as a method with parentheses.

The field name is count with lowercase 'c'. It must be returned exactly as declared.

4fill in blank

hard

Fill both blanks to create a method that adds a given number to the count.

C Sharp (C#)

class Counter {
    private int count = 0;
    public void Add([1] number) {
        count [2] number;
    }
}

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Aint

B+=

C-=

Dfloat

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-' operator instead of '+='.

Using a float parameter when count is int.

The method parameter must be an int to match the count type, and += adds the number to count.

5fill in blank

hard

Fill all three blanks to create a method that multiplies count by a factor and returns the result.

C Sharp (C#)

class Counter {
    private int count = 1;
    public int MultiplyBy([1] factor) {
        count [2] factor;
        return [3];
    }
}

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Aint

B*=

Ccount

Ddouble

Attempts:

3 left

💡 Hint

Common Mistakes

Returning the factor instead of count.

Using double type when count is int.

The parameter type is int, *= multiplies and assigns, and the method returns the updated count.