go: go.mod file not found in current directory or any parent directory; see ‘go help modules‘

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go build报错:
go: go.mod file not found in current directory or any parent directory; see ‘go help modules’
需要执行go mod init 初始化项目

编写demo:

package main
import "fmt"
func main(){
    fmt.Println("hello world.")
}

编译:go build

报错了

使用go mod init修复问题

继续编译,得到可执行程序,完成第一个demo

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go: go.mod file not found in current directory or any parent directory; see ‘go help modules‘

go.mod file not found in current directory or any parent directory; see ‘go help modules‘

go: go.mod file not found in current directory or any parent directory; see ‘go help modules‘

go: go.mod file not found in current directory or any parent directory; see ‘go help modules‘

解决go: go.mod file not found in current directory or any parent directory; see ‘go help modules‘

解决go: go.mod file not found in current directory or any parent directory; see ‘go help modules‘