How many ways can an argument be passed to a subroutine and explain them?

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Pushpendra Singh · Answer

An argument can be passed in two ways. They are passing by value and passing by reference. 
Passing by value: This method copies the value of an argument into the formal parameter of the subroutine. 
Passing by reference: In this method, a reference to an argument (not the value of the argument) is passed to the parameter.

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How many ways can an argument be passed to a subroutine and explain them?

Pushpendra Singh

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