Nested conditional execution in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if a number is positive.

PHP

<?php
$number = 10;
if ($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 '<' will check for negative numbers instead.

The condition $number > 0 checks if the number is positive.

2fill in blank

medium

Complete the code to check if a number is zero.

PHP

<?php
$number = 0;
if ($number [1] 0) {
    echo "Number is zero";
}
?>

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

A<

B!=

C==

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' will check if number is not zero.

The condition $number == 0 checks if the number equals zero.

3fill in blank

hard

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

PHP

<?php
$number = -5;
if ($number < 0) {
    if ($number [1] -10) {
        echo "Number is between -10 and 0";
    }
}
?>

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

A<

B>

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' will check if number is less than -10, which is outside the range.

The inner condition $number > -10 checks if the number is greater than -10, so it is between -10 and 0.

4fill in blank

hard

Fill both blanks to complete the nested condition that checks if a number is positive and even.

PHP

<?php
$number = 8;
if ($number [1] 0) {
    if ($number % 2 [2] 0) {
        echo "Number is positive and even";
    }
}
?>

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

A>

B==

C!=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' for positivity or '!=' for evenness will cause wrong results.

The first condition $number > 0 checks positivity. The second $number % 2 == 0 checks if the number is even.

5fill in blank

hard

Fill all three blanks to complete the nested condition that checks if a number is negative, odd, and less than -5.

PHP

<?php
$number = -7;
if ($number [1] 0) {
    if ($number % 2 [2] 0) {
        if ($number [3] -5) {
            echo "Number is negative, odd, and less than -5";
        }
    }
}
?>

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

A<

B!=

C<=

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>' instead of '<' for negativity or less than -5 check.

The first condition $number < 0 checks negativity. The second $number % 2 != 0 checks oddness. The third $number < -5 checks if number is less than -5.