Go if else Statement

The else Statement

Use the else statement to specify a block of code to be executed if the condition is false.

Syntax

if condition {
// code to be executed if condition is true
} else {
// code to be executed if condition is false
}

Using The if else Statement

Example

In this example, time (20) is greater than 18, so the if condition is false. Because of this, we move on to the else condition and print to the screen "Good evening". If the time was less than 18, the program would print "Good day":

package main
import ("fmt")

func main() {
  time := 20
  if (time < 18) {
    fmt.Println("Good day.")
  } else {
    fmt.Println("Good evening.")
  }
}

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Example

In this example, the temperature is 14 so the condition for if is false so the code line inside the else statement is executed:

package main
import ("fmt")

func main() {
  temperature := 14
  if (temperature > 15) {
    fmt.Println("It is warm out there")
  } else {
    fmt.Println("It is cold out there")
  }
}

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The brackets in the else statement should be like } else {:

Example

Having the else brackets in a different line will raise an error:

package main
import ("fmt")

func main() {
  temperature := 14
  if (temperature > 15) {
    fmt.Println("It is warm out there.")
  } // this raises an error
  else {
    fmt.Println("It is cold out there.")
  }
}

Result:


          ./prog.go:9:3: syntax error: unexpected else, expecting }

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