Functions and Parameters

Syntax of function 

Declaration section
<<Returntype>> funname(parameter list);
Definition section
<<Returntype>> funname(parameter list)
{
body of the function
}
Function Call
Funname(parameter);

Example function

   #include<stdio.h>

void fun(int a);  //declaration

int main()

{

  fun(10);  //Call

} 

void fun(int x)  //definition

{

  printf(“%d”,x); 

}

Actual and Formal parameters

Actual parameters are those that are used during a function call
Formal parameters are those that are used in function definition and function declaration