Nested loop execution in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print numbers 1 to 3 using a for loop.

PHP

<?php
for ($i = 1; $i [1] 3; $i++) {
    echo $i . " ";
}
?>

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

A<=

B>=

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using >= or > will cause the loop to not run as expected.

The for loop should run while $i is less than or equal to 3 to print numbers 1, 2, and 3. Using <= will loop correctly.

2fill in blank

medium

Complete the code to print a 3x3 grid of stars using nested loops.

PHP

<?php
for ($i = 1; $i <= 3; $i++) {
    for ($j = 1; $j [1] 3; $j++) {
        echo "* ";
    }
    echo "<br>";
}
?>

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

A>=

B<

C>

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using < will print only 2 stars per line.

The inner loop should run while $j is less than or equal to 3 to print 3 stars per line.

3fill in blank

hard

Fix the error in the nested loop to print numbers 1 to 3 in each row.

PHP

<?php
for ($i = 1; $i <= 3; $i++) {
    for ($j = 1; $j [1] 3; $j++) {
        echo $j . " ";
    }
    echo "<br>";
}
?>

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

A<

B<=

C>

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using < will miss printing the number 3.

The inner loop must run while $j is less than or equal to 3 to print numbers 1, 2, and 3.

4fill in blank

hard

Fill both blanks to create a nested loop that prints a 4x4 grid of numbers.

PHP

<?php
for ($i = 1; $i [1] 4; $i++) {
    for ($j = 1; $j [2] 4; $j++) {
        echo $j . " ";
    }
    echo "<br>";
}
?>

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

A<=

B<

C>

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using < will print only 3 rows or columns.

Both loops should run while their counters are less than or equal to 4 to print numbers 1 to 4 in each row and 4 rows total.

5fill in blank

hard

Fill all three blanks to create a nested loop that prints a multiplication table from 1 to 3.

PHP

<?php
for ($i = 1; $i [1] 3; $i++) {
    for ($j = 1; $j [2] 3; $j++) {
        echo $i [3] $j . " ";
    }
    echo "<br>";
}
?>

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

A<=

B<

C*

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using < will miss the last row or column.

Using + instead of * will add numbers instead of multiplying.

Both loops run while their counters are less than or equal to 3. The multiplication operator (*) is used to print the product of $i and $j.