Arithmetic operators in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add two numbers and print the result.

PHP

<?php
$a = 5;
$b = 3;
$result = $a [1] $b;
echo $result;
?>

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

A/

B-

C+

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using minus - instead of plus +.

The plus sign + adds two numbers together.

2fill in blank

medium

Complete the code to multiply two numbers and print the result.

PHP

<?php
$x = 7;
$y = 4;
$product = $x [1] $y;
echo $product;
?>

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

A*

B-

C+

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using plus + instead of multiplication *.

The asterisk * multiplies two numbers.

3fill in blank

hard

Fix the error in the code to correctly divide two numbers and print the result.

PHP

<?php
$num1 = 10;
$num2 = 2;
$division = $num1 [1] $num2;
echo $division;
?>

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

A+

B-

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using minus - or multiplication * instead of division /.

The forward slash / divides one number by another.

4fill in blank

hard

Fill both blanks to create a dictionary of squares for numbers greater than 3.

PHP

<?php
$numbers = [1, 2, 3, 4, 5];
$squares = [];
foreach ($numbers as $num) {
    if ($num [1] 3) {
        $squares[$num] = $num [2] 2;
    }
}
print_r($squares);
?>

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

A>

B<

C**

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using less than < instead of greater than >.

Using multiplication * instead of power ** for squaring.

The operator > checks if a number is greater than 3. The operator ** raises the number to the power of 2 (square).

5fill in blank

hard

Fill all three blanks to create an array of numbers and filter those divisible by 2.

PHP

<?php
$numbers = range(1, 10);
$evens = [];
foreach ($numbers as [1]) {
    if ([2] % 2 [3] 0) {
        $evens[] = [2];
    }
}
print_r($evens);
?>

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

A$num

Bnum

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable without $ sign.

Using not equal != instead of equal ==.

The variable $num is used to loop through numbers. The operator == checks if the remainder is zero, meaning the number is divisible by 2.