Now lets continue from where we left off our topic “function “. In this post we are going to discuss about types of functions .

TYPES OF FUNCTIONS 

Now there are 4 types by which we can make a function :

  • function with return type and no parameter
  • function with no return type and no parameter
  • function with no return type and parameter
  • function with return type and parameter

 

FUNCTION WITH NO RETURN TYPE AND NO PARAMETER

SYNTAX

void function_name()

{

statements ;

}

Now clearly no return types means “void ” datatype and no parameter means there wont be any parameter . Now consider this example it will help you to understand better .

EXAMPLE

3.3

3.2

 

FUNCTION WITH NO RETURN TYPE AND PARAMETER

SYNTAX

void function_name( parameter , parameter,..)

{

statements ;

}

Now clearly no return types means “void ” datatype but  parameter is taken means there will be  variables either entereed by the user or by programmer as discussed earlier . Now consider this example it will help you to understand better .

EXAMPLE

3.7

3.5

here in sum(a,b) we are passing the variables to the function defined .

FUNCTION WITH RETURN TYPE AND NO PARAMETER

SYNTAX

datatype function_name()
{

statements ;

return variable;

}

Now  return types means any datatype other than void and no parameter means there wont be any parameter . Now consider this example it will help you to understand better .

EXAMPLE

3.4
3.2

 

Here we directly output the sum via cout statement , because sum was returning a value and we could have either stored it in a variable and then cout it like written below

int s=sum();

cout<<s;

or the way it is done in example both are correct way of writting it .

 

FUNCTION WITH RETURN TYPE AND PARAMETER

SYNTAX

datatype function_name(parameter,parameter)

{

statements ;

}

Now return types means any  datatype except “void” and  parameter means there will be  parameters . Now consider this example it will help you to understand better .

EXAMPLE

3.6

3.5

 

 

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