Increment and decrement operators - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to increase the value of count by 1 using the increment operator.

C

int count = 5;
count[1];
printf("%d", count);

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

A+=

B--

C++

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using the decrement operator -- instead of increment.

Using += without specifying the value.

The increment operator ++ increases the value of a variable by 1.

2fill in blank

medium

Complete the code to decrease the value of num by 1 using the decrement operator.

C

int num = 10;
[1]num;
printf("%d", num);

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

A--

Bnum++

Attempts:

3 left

💡 Hint

Common Mistakes

Using the increment operator ++ instead of decrement.

Placing the operator after the variable when the problem expects before.

The decrement operator -- decreases the value of a variable by 1. Placing it before the variable decreases the value before use.

3fill in blank

hard

Fix the error in the code to correctly increment value by 1.

C

int value = 7;
value [1];
printf("%d", value);

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

A++value

B++

Cvalue+1

Dvalue++

Attempts:

3 left

💡 Hint

Common Mistakes

Writing just ++ without the variable.

Using value+1 which does not change the variable.

Using value++ increments the value after its current use. It is a correct way to increase by 1.

4fill in blank

hard

Fill both blanks to create a loop that decreases i from 5 to 1.

C

for(int i = 5; i [1] 0; i[2]) {
    printf("%d ", i);
}

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

A>

B<

C--

D++

Attempts:

3 left

💡 Hint

Common Mistakes

Using < instead of > in the condition.

Using ++ instead of -- in the update.

The loop runs while i is greater than 0 and decreases i by 1 each time using --.

5fill in blank

hard

Fill all three blanks to create a loop that prints numbers from 1 to 5 using increment.

C

for(int num = [1]; num [2] 5; num[3]) {
    printf("%d ", num);
}

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

A0

B<=

C++

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Starting from 0 instead of 1.

Using < instead of <= in the condition.

Using decrement operator instead of increment.

The loop starts at 1, runs while num is less than or equal to 5, and increments num by 1 each time.