How Can I Print Percent Signs in Go's `Println` Without go vet Warnings?

Writing Percent Signs in Println Without Go vet Warnings

When writing code in Go, developers may encounter go vet warnings when using the Println function with percent signs. For instance, the following code:

package main

import (
    "fmt"
)

func main() {
    fmt.Println("%dude") // Warning: Println call has possible formatting directive %d
}

will trigger the warning:

./prog.go:8:2: Println call has possible formatting directive %d

This warning indicates that go vet suspects the intention is to use a formatting directive, rather than printing two percent signs. To avoid this warning, developers can consider the following alternatives:

1. Escape the Percent Sign: Use a backslash before the percent sign to escape it:

fmt.Println("%%dude")

2. Encode the Percent Sign as a Hexadecimal Escape Sequence: Represent the percent sign as x25:

fmt.Println("%\x25dude")

3. Use Printf with a Format String: Use Printf instead of Println and explicitly specify the format string:

fmt.Printf("%%%%dude\n")

4. Assign the String to a Variable: Assign the string with the percent signs to a variable and then print the variable using Println:

s := "%dude"
fmt.Println(s)

By using these alternatives, developers can successfully print percent signs without triggering go vet warnings.

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