Question

What is an subprogram or subroutine and how is it defined?

What is a subprogram: Call? Header? Protocol? Signature?

What are formal and actual parameters for a subprogram?

How does a programming language match formal and actual parameters?

Answer 1

Answer 1:
subprogram or subroute is set of statement which is wrapped in a block and has anem
syntax:
int sum(){
}
here we have defined the sum subprogram or subroutine

Answer 2:
Call: calling the defined subroutine. means we are using the subroutine what we have defineed
Signature: It contains name of the subroutine,what parameters it takes and its types and what it will return
Protocl: rules to follow to call the subroutine

Answer 3:
formatl arguments: These are defined at subprogram or subroutine
actual arguments: These are passed from caller side
int sum(int x,int y)
{
   return x+y;
}
a=10,b=20;
print(sum(a,b));

here x and y are formatl arguments and a,b are actual arguments

Answer 4:
programming language matches arguments using the order and type of arguments
defined in subroutine

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