Formatting strings

The Go standard library offers multiple ways to substitute values in a text template. Here, we will discuss the text formatting utilities in the fmt package. They offer a simple and convenient way to substitute values in a text template.

How to do it...

• Use the fmt.Print family of functions to format values
• fmt.Print will print a value using its default formatting
• A string value will be printed as is
• A numeric value will be first converted to a string as an integer, a decimal number, or by using scientific notation for large exponents
• A Boolean value will be printed as true or false
• Structured values will be printed as a list of fields

If a Print function ends with ln (such as fmt.Println), a new line will be output after the string.

If a Print function ends with f, the function will accept a format argument, which will be used as the template into which it will substitute values.

fmt.Sprintf will format a string and return...