Placeholder
Also written: placeholders, format codes
`{}` or `{name}` in printed text, which Rust replaces with a value. Codes like `{:02}`, `{:.2}`, `{:<16}` and `{:>4}` control digits, decimals and alignment.
Also written: placeholders, format codes
`{}` or `{name}` in printed text, which Rust replaces with a value. Codes like `{:02}`, `{:.2}`, `{:<16}` and `{:>4}` control digits, decimals and alignment.