I'm stuck with that loop. :(

I had to make a loop print out the numbers 1 to 100.

• Create a FOR loop that displays each number from 1 to 100. Make sure that you DO NOT show 0 and you DO show 100.

which is that:

<?php $facts = array( 57 => ' on Heinz ketchup bottles represents the number of varieties of pickles the company once had.', 2 => ' is the approximate hours a day Giraffes sleeps', 18 => ' is the average hours a Python sleeps per day', 10 => ' per cent of the world is left-handed.', 11 => ' Empire State Buildings, stacked one on top of the other, would be required to measure the Gulf of Mexico at its deepest point.', 98 => '% of the atoms in your body are replaced every year', 69 => ' is the largest number of recorded children born to one woman', );

for ($fact = 1; $fact <= 100; $fact++){ echo $fact; }

Here can anyone tell me why there's no s to $fact? because the variable is $facts not fact.

Here is what I can't figure out.

Use the function isset to test if the incremented value equals one of the keys in the $facts array. If there is a key that matches, display the value AFTER the number.

<?php
$facts = array(
    57 => ' on Heinz ketchup bottles represents the number of varieties of pickles the company once had.',
    2 => ' is the approximate hours a day Giraffes sleeps',
    18 => ' is the average hours a Python sleeps per day',
    10 => ' per cent of the world is left-handed.',
    11 => ' Empire State Buildings, stacked one on top of the other, would be required to measure the Gulf of Mexico at its deepest point.',
    98 => '% of the atoms in your body are replaced every year',
    69 => ' is the largest number of recorded children born to one woman',
);
//add your loop below this line
for ($fact = 1; $fact <= 100; $fact++) {
  echo $fact . if (isset($fact['']));
}