Web Reference: Several Ruby core classes have instance method printf or sprintf: Each of these methods takes: Argument format_string, which has zero or more embedded format specifications (see below). Arguments *arguments, which are zero or more objects to be formatted. May 20, 2024 · If you need to customize your output with specific variable placeholders, it's advisable to use the 'printf' method. This approach allows you a greater control over dictating and modifying your output's format by employing carefully selected format specifiers. Jan 11, 2019 · For syntax look at any printf docs, but check the sprintf docs on ruby-doc. They're separated by commas because they're separate parameters to the function, but that's more or less syntactic sugar.
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