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Monday, April 6, 2020

Write a php program to check wether a number is prime or not

Write a php program to check wether a number is prime or not

<?php

// PHP code to check wether a number is prime or Not

function primeCheck($number)

{

if ($number == 1)

return 0;

for ($i = 2; $i <= $number/2; $i++)

{

if ($number % $i == 0)

return 0;

}

return 1;

}

$number = 31;

$flag = primeCheck($number);

if ($flag == 1)

echo "Prime number";

else

echo "Not Prime number"

?>

Write a program in php to check given number is even or odd

Write a program in php to check given number is even or odd

Answer:

<html>

<body>

<h3>Odd or Even PHP Example</h3>

<form action="" method="post">

<label>Enter a number</label>

<input type="text" name="number" />

<input type="submit" />

</form>

</body>

</html>

<?php

if($_POST){

$number = $_POST['number'];

//check if the enter value is a number or throw an error

if (!(is_numeric($number) && is_int(0+$number))){

echo "<p style='color:red;'>Error: You entered a string. Please enter an Integer</p>";

die();

}

//divide the entered number by 2

//if the reminder is 0 then the number is even otherwise the number is odd

if(($number % 2) == 0){

echo "You entered an Even number";

}else{

echo "You entered an Odd number";

}

}

?>

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