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Which of these is a valid way to define a function in Perl?

56. Which of these is a valid way to define a function in Perl?

1. returntype function_name{
   }
2. sub function_name{
   }
3. function function_name{
   }
4. None of these

Answer: B)

sub function_name{
}

Explanation:

The valid method to define a function in Perl,

sub function_name{	
}