// exgl5.go  example  if then else

package main

import("fmt")

func main() {
  fmt.Println("go run exgl5.go  running")

  // the normal comparison  ==  !=  >=  <=  <  > 

  if 8%4 == 0 {  // the  {  must be here, not on next line
    fmt.Println("8 is divisible by 4")
  }

  var n = 2
  if ((n < 3) && (n > 1)) || n != 3 {
      fmt.Println("n=", n)
  }
  
  if 7%2 == 0 {
      fmt.Println("7 is even")
  } else {  // both  }  and  {  must be here, not on other lines
      fmt.Println("7 is odd")
  }


  // A statement can precede conditionals; any variables declared
  // in this statement are available in all branches. num

  if num := 9; num < 0 {
      fmt.Println(num, "is negative")
  } else if num < 10 {    // both  }  and  {  must be on this line
      fmt.Println(num, "has 1 digit")
  } else {
      fmt.Println(num, "has multiple digits")
  }

  fmt.Println("exgl5.go finished")
}