Function Call by Value

#include <stdio.h>

void func1(int a)
{
  printf("\nIn func1 the value of a is: %d",a);
}

void func2(int b)
{
  printf("\nIn func2 the value of a is: %d",b);
}

int main()
{
  int x=10;
  printf("In Func Main");
  func1(x);
  func2(x);
  func1(x);
  return 0;
}

Output:

In Func Main
In func1 the value of a is: 10
In func2 the value of a is: 10
In func1 the value of a is: 10

Program: Multiplication two numbers using function Call with Arguments

#include <stdio.h>

int multiply(int a, int b) 
{
  int c=0;
  c=a*b;
  return c;
}

int main() {
  int num1 = 6, num2 = 7;
  int result=0;
  result = multiply(num1, num2);
  printf("Multiplication: %d\n", result);
  return 0;
}