If statement in C - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the number is positive.

C

if (num [1] 0) {
    printf("Positive number\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 age is at least 18.

C

if (age [1] 18) {
    printf("Adult\n");
}

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

A==

B<=

C>=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' or '<=' checks for younger ages.

Using '==' only checks if age is exactly 18.

The condition age >= 18 checks if age is 18 or older.

4fill in blank

hard

Fill both blanks to check if a number is between 10 and 20 (inclusive).

C

if (num [1] 10 && num [2] 20) {
    printf("In range\n");
}

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

A>=

B<

C<=

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '<=' excludes 20 from the range.

Using '>' instead of '>=' excludes 10 from the range.

The condition checks if num >= 10 and num <= 20, meaning num is between 10 and 20 inclusive.

5fill in blank

hard

Fill all three blanks to print "Valid" if score is above 50 and below 100.

C

if (score [1] 50 && score [2] 100) {
    printf("[3]\n");
}

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

A>

B<

C<=

DValid

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>=' or '<=' changes the range to include 50 or 100.

Printing wrong message or missing quotes.

The condition checks if score > 50 and score < 100. If true, it prints "Valid".