How to output prime numbers between 1 and 100 in PHP?
Here is a PHP code example for outputting all prime numbers between 1 and 100.
<?php
function is_prime($num) {
if($num < 2) {
return false;
}
for ($i = 2; $i <= sqrt($num); $i++) {
if ($num % $i == 0) {
return false;
}
}
return true;
}
for ($i = 1; $i <= 100; $i++) {
if (is_prime($i)) {
echo $i . " ";
}
}
?>
In the code above, we first define a function called is_prime to determine if a number is a prime number. We then use a loop to iterate through all numbers from 1 to 100, calling the is_prime function for each number. If it returns true, we output that number. The final output is all prime numbers between 1 and 100.