Why conditional flow control is needed in C Sharp (C#) - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if a number is positive.

C Sharp (C#)

if (number [1] 0) {
    Console.WriteLine("Positive number");
}

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.

The symbol > means 'greater than', so this checks if number is greater than zero.

2fill in blank

medium

Complete the code to print "Even" if the number is divisible by 2.

C Sharp (C#)

if (number % 2 [1] 0) {
    Console.WriteLine("Even");
}

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.

The '==' operator checks if the remainder is zero, meaning the number is even.

3fill in blank

hard

Fix the error in the conditional to check if age is at least 18.

C Sharp (C#)

if (age [1] 18) {
    Console.WriteLine("Adult");
}

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

A<

B!=

C>=

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>' excludes exactly 18, which is incorrect here.

The '>=' operator means 'greater than or equal to', which checks if age is 18 or more.

4fill in blank

hard

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

C Sharp (C#)

if (number [1] 10 && number [2] 20) {
    Console.WriteLine("Between 10 and 20");
}

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, which is incorrect.

The first blank uses '>=' to check number is at least 10, the second uses '<=' to check number is at most 20.

5fill in blank

hard

Fill all three blanks to print "Teenager" if age is between 13 and 19 inclusive.

C Sharp (C#)

if (age [1] 13 && age [2] 19) {
    Console.WriteLine([3]);
}

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

A>=

B<=

C"Teenager"

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' instead of range checks will only check one age.

The first blank checks if age is at least 13, the second checks if age is at most 19, and the third prints the string "Teenager".