Why conditional flow is needed in PHP - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if a number is positive.

PHP

<?php
$number = 5;
if ($number [1] 0) {
    echo "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.

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

The condition $number > 0 checks if the number is greater than zero, meaning it is positive.

2fill in blank

medium

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

PHP

<?php
$number = 4;
if ($number % 2 [1] 0) {
    echo "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.

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

The condition $number % 2 == 0 checks if the remainder when dividing by 2 is zero, meaning the number is even.

3fill in blank

hard

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

PHP

<?php
$number = -3;
if ($number [1] 0) {
    echo "Negative number";
}
?>

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 $number < 0 correctly checks if the number is less than zero, meaning negative.

4fill in blank

hard

Fill both blanks to create a condition that checks if a number is between 1 and 10.

PHP

<?php
$number = 7;
if ($number [1] 1 && $number [2] 10) {
    echo "Number is between 1 and 10";
}
?>

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

A>

B<

C>=

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using only '>' or '<' excludes the boundary numbers.

Mixing up the operators can cause wrong results.

The condition $number >= 1 && $number <= 10 checks if the number is at least 1 and at most 10.

5fill in blank

hard

Fill all three blanks to create a condition that checks if a number is positive, even, and less than 20.

PHP

<?php
$number = 16;
if ($number [1] 0 && $number % 2 [2] 0 && $number [3] 20) {
    echo "Number is positive, even, and less than 20";
}
?>

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

A>

B==

C<

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>=' instead of '>' includes zero, which is not positive.

Using '!=' instead of '==' for evenness checks odd numbers.

Using '>=' instead of '<' for the upper limit includes 20.

The condition checks three things: number greater than zero, number even (remainder zero), and number less than 20.