[Solved] Consider the following PHP code:function multiply($x, $y = 2) { return $x * $y; } echo multiply(5);What will be the output and why? | PHP

PHP - Functions

Consider the following PHP code:

function multiply($x, $y = 2) {
    return $x * $y;
}
echo multiply(5);

What will be the output and why?

A0 because default value is ignored

B5 because only one argument is passed

CError because both parameters are required

D10 because the second parameter uses default value 2

Step-by-Step Solution

Solution:

Step 1: Understand default parameter usage
The function multiply has two parameters, where $y has a default value of 2.
Step 2: Analyze the function call
Calling multiply(5) passes 5 as $x, and since $y is not provided, it uses the default 2.
Step 3: Calculate the result
The function returns 5 * 2 = 10, which is printed by echo.
Final Answer:
10 because the second parameter uses default value 2 -> Option D
Quick Check:
5 * 2 = 10 with default parameter [OK]

Quick Trick: Default parameters fill missing arguments automatically [OK]

Common Mistakes:

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