PHP函数Math

Question

I have to create a PHP code calls a function with 2 numbers and displays the function return value using an echo statement. Bellow is all I have so far. Not sure where I messed up or what I need to add. Just stuck.

 <?php 

function myfunction( $argx = 5 , $arg4 = 4) {

return ($argx * $arg4);


}

echo ($argx * $arg4);

Answer 1

The function you made can now be used with for example

echo myfunction(7,8);

If you simply do

echo myfunction();

it will be the same as

echo myfunction(5,4);

since you've put these values as default.

Read into PHP functions, e.g. https://www.w3schools.com/php/php_functions.asp