Working with functions

What will be displayed on the screen when the following code snippet is executed?

package main

import "fmt"

func main() {
 
 var X int = 020
 var Y float64 = 10.5
 var Z float64
 
 Z = float64(X)-float64(Y)
 fmt.Println(Z)
}
Options
  1. 9.5
  2. 4.5
  3. 5.5
  4. Error

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