처음부터 시작 - 부울 논리 적용

This article will cover working with boolean logic. You will learn how to work with boolean data, if, else if and else constructs.

What does that mean?

Ok, can you show me?

printMessage := true
 if printMessage {
  fmt.Println("Message")
 }

Ok, I think I get it.

시리즈

if 구조

if true {
  // statements here will always run
}

부울 변수 사용

accountBalance = 100
accountCredit = 200
if accountBalance + accountCredit > 0 {
  fmt.Println("You have money to spend")
}

다른 소개

accountBalance = 100
accountCredit = 200
if accountBalance + accountCredit > 0 {
  fmt.Println("You have money to spend")
} else {
  fmt.Println("No money left, please add more funds")
}

다른 경우 사용

if testScore >= testScoreGrade5 {
  fmt.Println("Top mark")
 } else if testScore >= testScoreGrade4 {
  fmt.Println("Pass with distinction")
 } else if testScore >= testScoreGrade3 {
  fmt.Println("Pass with distinction")
 } else {
  fmt.Println("Failed")
 }

여러 표현식

hasGas := true
hasKeyInIgnition := true
if hasGas && hasKeyInIgnition {
  fmt.Println("Can drive car")
 }

  hasBurger := true
  hasSandwich := false

  if hasBurger || hasSandwich {
    fmt.Println("Can eat")
  }

   hasSandwich := false

   if !hasSandwich {
    mt.Println("No sandwiches, then I will starve, I only eat sandwiches")
   }

연습 - 부울 논리를 테스트하는 프로그램 만들기

    package main

    import "fmt"

    func main() {
     testScoreGrade5 := 80
     testScoreGrade4 := 60
     testScoreGrade3 := 50
     testScore := 49

     hasGas := true
     hasKeyInIgnition := true

     hasBurger := true
     hasSandwich := false

     printMessage := true
     if printMessage {
      fmt.Println("Message")
     }

     if testScore >= testScoreGrade5 {
      fmt.Println("Top mark")
     } else if testScore >= testScoreGrade4 {
      fmt.Println("Pass with distinction")
     } else if testScore >= testScoreGrade3 {
      fmt.Println("Pass with distinction")
     } else {
      fmt.Println("Failed")
     }

     if hasGas && hasKeyInIgnition {
      fmt.Println("Can drive car")
     }

     if hasBurger || hasSandwich {
      fmt.Println("Can eat")
     }

     if !hasSandwich {
      fmt.Println("No sandwiches, then I will starve, I only eat sandwiches")
     }
    }

   go run main.go

    Message
    Failed
    Can drive car
    Can eat
    No sandwiches, then I will starve, I only eat sandwiches

요약