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競プロで使うための GO 入門 ~Hello World~

Last updated at Posted at 2020-07-18

Index

Hello World

package main

import "fmt"

func main() {
    fmt.Println("Hello World")
}

パッケージ

関数を使用するためには、パッケージをインポートする必要がある。
"fmt"は、標準入出力の関数を含む。

import "fmt"

または、

import(
    "fmt"
)

ブレースの位置

Goはブレースの位置が決まっているため、以下の記述ではエラーになる。

func main()
{
	fmt.Println("Hello World")
}

// エラー出力例
// missing function body
// syntax error: unexpected semicolon or newline before {
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