// Go program to create a pointer
// and passing it to the function
package main
  
import "fmt"
  
// taking a function with integer
// type pointer as an parameter
func ptf(a *int) {
  
    // dereferencing
    *a = 748
}
  
// Main function
func main() {
  
    // taking a normal variable
    var x = 100
  
        fmt.Printf("The value of x before function call is: %d\n", x)
  
    // taking a pointer variable
    // and assigning the address
    // of x to it
    var pa *int = &x
  
    // calling the function by
    // passing pointer to function
    ptf(pa)
  
    fmt.Printf("The value of x after function call is: %d\n", x)
  
}

The value of x before function call is: 100
The value of x after function call is: 748

// Go program to create a pointer
// and passing the address of the
// variable to the function
package main
  
import "fmt"
  
// taking a function with integer
// type pointer as an parameter
func ptf(a *int) {
  
    // dereferencing
    *a = 748
}
  
// Main function
func main() {
  
    // taking a normal variable
    var x = 100
      
    fmt.Printf("The value of x before function call is: %d\n", x)
  
    // calling the function by
    // passing the address of
    // the variable x
    ptf(&x)
  
    fmt.Printf("The value of x after function call is: %d\n", x)
  
}

The value of x before function call is: 100
The value of x after function call is: 748