What will be the output of the following PHP code? lt;?php function calc($price, $tax="") $total = $price + ($price * $tax); echo "$total"; calc(42); ?>

What will be the output of the following PHP code &lt...

This question belongs to PHP Functions

Functions

What will be the output of the following PHP code?

<?php
function calc($price, $tax="")
{
    $total = $price + ($price * $tax);
    echo "$total"; 
}
calc(42);	
?>

A) Error B) 0 C) 42 D) 84

Answer & Solution

Correct Answer: Option C

You can designate certain arguments as optional by placing them at the end of the list and assigning them a default value of nothing.

Question posted by Examveda

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Anil Dadhich 7 years ago

Sir i think 42 is wrong answer because you pass $tax as string in function, so how we can multiply a number with a string.

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<?php
function calc($price, $tax)	
{
    $total = $price + $tax;
}
$pricetag = 15;
$taxtag = 3;
calc($pricetag, $taxtag);	
?>

<?php
function calc($price, $tax="")
{
    $total = $price + ($price * $tax);
    echo "$total"; 
}
calc(42);	
?>