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arithmetic.php
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arithmetic.php
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<?php
function add($a, $b)
{
$error = errorCheck($a, $b);
if ($error) {
return $a + $b;
}
}
function subtract($a, $b)
{
$error = errorCheck($a, $b);
if ($error) {
return $a - $b;
}
}
function multiply($a, $b)
{
$error = errorCheck($a, $b);
if ($error) {
return $a * $b;
}
}
function divide($a, $b)
{
$error = errorCheck($a, $b);
if ($error) {
if($a != 0 && $b != 0){
return $a / $b;
} else {
echo "ERROR: Cannot divide by 0\n";
}
}
}
function modulus($a, $b)
{
$error = errorCheck($a, $b);
if ($error) {
if($a != 0 && $b != 0 ){
return $a % $b;
} else {
echo "ERROR: Cannot divide by 0\n";
}
}
}
function errorCheck($a, $b)
{
if(!is_numeric($a) || !is_numeric($b)){
echo "ERROR: Both arguments must be numbers\n";
return false;
} else {
return true;
}
}
// Add code to test your functions here
echo add(10, 2) . PHP_EOL;
echo subtract(10, 2) . PHP_EOL;
echo multiply(10, 2) . PHP_EOL;
echo divide(10, 2) . PHP_EOL;
echo modulus(10, 2) . PHP_EOL;