Challenge 1 — Solution

Task: Use a for loop to echo the multiplication table for 7, from 7×1
up to 7×12, one line per result.

<?php
    for ($i = 1; $i <= 12; $i++) {
        echo "7 x $i = " . (7 * $i) . "<br>";
    }
?>


Output (first three lines):
7 x 1 = 7
7 x 2 = 14
7 x 3 = 21
... (continuing through 7 x 12 = 84)

Notes:
- $i starts at 1, the loop continues while $i <= 12, and $i++ advances
  it by one after every iteration - exactly the three-part shape from
  the chapter's own first for loop example.
- (7 * $i) is calculated fresh on each pass and concatenated into the
  echoed string with the . operator.
- Using <= 12 (not < 12) is what makes the table correctly include the
  12x row rather than stopping one short at 11x.