If–else statement in C - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if a number is positive.

C

if (num [1] 0) {
    printf("Positive\n");
}

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

A>

B<

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' will check for negative numbers.

Using '==' checks for equality, not positivity.

The condition num > 0 checks if the number is positive.

2fill in blank

medium

Complete the code to print "Even" if the number is even.

C

if (num % 2 [1] 0) {
    printf("Even\n");
}

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

A>

B!=

C==

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' will check for odd numbers instead.

Using '>' or '<' does not correctly check for evenness.

The condition num % 2 == 0 checks if the number is even.

3fill in blank

hard

Fix the error in the if statement to check if a number is negative.

C

if (num [1] 0) {
    printf("Negative\n");
}

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

A!=

B>

C==

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>' checks for positive numbers instead.

Using '==' checks for zero, not negativity.

The condition num < 0 correctly checks if the number is negative.

4fill in blank

hard

Fill both blanks to complete the if-else statement that prints if a number is positive or not.

C

if (num [1] 0) {
    printf("Positive\n");
} else {
    printf("[2]\n");
}

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

A>

BNegative

CZero

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' in the first blank reverses the logic.

Printing 'Zero' instead of 'Negative' changes the meaning.

The condition num > 0 checks positivity, else it prints "Negative".

5fill in blank

hard

Fill all three blanks to complete the if-else if-else statement that checks if a number is positive, zero, or negative.

C

if (num [1] 0) {
    printf("Positive\n");
} else if (num [2] 0) {
    printf("Zero\n");
} else {
    printf("[3]\n");
}

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

A>

B==

CNegative

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up comparison operators.

Printing wrong labels for conditions.

The first condition checks if num > 0, second if num == 0, else prints "Negative".