How do I Print a Literal Percentage Symbol Using fmt.Printf in Go?

Escaping Variables with Printf for Precision

When utilizing fmt.Printf to format output, one may encounter instances where a literal percentage symbol (%) is desired within the formatted string. To achieve this and prevent its interpretation as a formatting directive, it's essential to escape the percentage character.

Escaping the First Occurrence of %v

To escape the first occurrence of %v within the format string, you cannot simply prefix it with abackslash (), as %v will still be interpreted as a formatting directive.

Solution: Using %%

The correct method to escape a literal % is to use %%. This sequence literally prints a percentage sign and consumes no value.

Example:

To escape the first %v and allow the second %v to be treated as a formatting directive, use the following code:

fmt.Printf("Escape this -> %%v... Do not escape this -> %v", "Unescaped")

This will produce the output:

Escape this -> %v... Do not escape this -> Unescaped

Additional Notes:

For further reference, please refer to the fmt package documentation for a comprehensive list of escape sequences:

https://golang.org/pkg/fmt/

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