possible formatting directive

本文主要是介绍possible formatting directive，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

比如：

fmt.Println("Hello, playground %d",i)
那么会出现warning:Println call has possible formatting directive %d Go vet exited.

 

fmt.Println doesn't do formatting things like %d. Instead, it uses the default format of its arguments, and adds spaces between them.

fmt.Println("Hello, playground",i)  // Hello, playground 5
If you want printf style formatting, use fmt.Printf.

fmt.Printf("Hello, playground %d\n",i)
And you don't need to be particular about the type. %v will generally figure it out.

fmt.Printf("Hello, playground %v\n",i)

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