Function definition

A function is a body of code that returns a value. The value returned may depend on arguments provided to the function.

Function definition
You are encouraged to solve this task according to the task description, using any language you may know.

Write a definition of a function called "multiply" that takes two arguments and returns their product.

C

double multiply( double a, double b )
{
  return a * b;
}

{header|Perl}

sub multiply( $$ )
{
  $a = shift;
  $b = shift;
  return $a * $b;
}

{header|PHP}

function multiply( $a, $b )
{
   return $a * $b;
}