Elseif ladder execution in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the 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 '<' instead of '>' will check for negative numbers.

Using '==' checks only if number equals zero.

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

2fill in blank

medium

Complete the elseif condition to check if the number is zero.

PHP

<?php
$number = 0;
if ($number > 0) {
    echo "Positive number";
} elseif ($number [1] 0) {
    echo "Zero";
}
?>

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

A==

B<

C>

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' checks if number is not zero, which is incorrect here.

Using '<' or '>' checks for negative or positive numbers, not zero.

The condition $number == 0 checks if the number is exactly zero.

3fill in blank

hard

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

PHP

<?php
$number = -5;
if ($number > 0) {
    echo "Positive number";
} elseif ($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, not negative.

Using '==' checks if number equals zero, not negative.

The condition $number < 0 checks if the number is negative.

4fill in blank

hard

Fill both blanks to complete the elseif ladder that prints the correct message based on the number.

PHP

<?php
$number = 0;
if ($number [1] 0) {
    echo "Positive number";
} elseif ($number [2] 0) {
    echo "Negative number";
} else {
    echo "Zero";
}
?>

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

A>

B<

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the operators will cause wrong messages.

Using '==' in the first two conditions misses positive or negative checks.

The first condition checks if the number is greater than zero (positive). The elseif checks if it is less than zero (negative). Otherwise, it is zero.

5fill in blank

hard

Fill all three blanks to create an elseif ladder that prints the correct message for positive, negative, or zero values.

PHP

<?php
$number = -3;
if ($number [1] 0) {
    echo "Positive number";
} elseif ($number [2] 0) {
    echo "Negative number";
} elseif ($number [3] 0) {
    echo "Zero";
}
?>

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

A>

B<

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' instead of '==' for zero check causes wrong output.

Mixing up the operators leads to incorrect messages.

The ladder checks if the number is greater than zero (positive), less than zero (negative), or equal to zero (zero).