Use cases - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print "Hello, World!" in C.

C

#include <stdio.h>

int main() {
    [1]("Hello, World!\n");
    return 0;
}

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

Aecho

Bprintf

Cprint

Dcout

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'print' instead of 'printf'.

Using 'echo' which is not a C function.

Using 'cout' which is from C++.

The printf function is used in C to print text to the console.

2fill in blank

medium

Complete the code to declare an integer variable named 'count' and assign it the value 10.

C

int [1] = 10;

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

Acount

Bnumber

Cvalue

Dtotal

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different variable name than 'count'.

The variable name should be 'count' as specified.

3fill in blank

hard

Fix the error in the code to correctly compare if 'a' is greater than 'b'.

C

if (a [1] b) {
    printf("a is greater\n");
}

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

A>

B==

C=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' which is assignment, not comparison.

Using '==' which checks equality, not greater than.

The '>' operator checks if 'a' is greater than 'b'.

4fill in blank

hard

Fill both blanks to create a for loop that counts from 0 to 4.

C

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

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

A0

B<

C>

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Starting at 1 instead of 0.

Using 'i > 5' which would never run.

The loop starts at 0 and continues while i is less than 5.

5fill in blank

hard

Fill all three blanks to declare a function named 'add' that takes two integers and returns their sum.

C

int [1](int [2], int [3]) {
    return a + b;
}

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

Aadd

Ba

Cb

Dsum

Attempts:

3 left

💡 Hint

Common Mistakes

Using different parameter names than 'a' and 'b'.

Naming the function something other than 'add'.

The function name is 'add' and parameters are 'a' and 'b'.