Rust conditionals: Difference between revisions
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2 => "b", | 2 => "b", | ||
_ => "c", // anything other than 1 or 2 | _ => "c", // anything other than 1 or 2 | ||
} | |||
</syntaxhighlight> | |||
You can match multiple values | |||
<syntaxhighlight lang="rust"> | |||
let result = match num { | |||
1 | 3 | 5 => "one three or five", | |||
_ => "something else" | |||
} | } | ||
</syntaxhighlight> | </syntaxhighlight> | ||
</blockquote><!-- Pattern Matching --> | </blockquote><!-- Pattern Matching --> |
Revision as of 21:52, 7 February 2023
if statement
if num < 5 { // .. } else if { // .. } else { // .. }
Ternary operator
let weather = if season == "fall" { "lovely" } else { "fine I guess" } // ternary
Pattern Matching
Like a switch statement,
but the compiler ensures the entire valid range of items is checked for.
especially useful for enums.In the following case, if
_
was omitted
you'd need to ensure the full range of possible i32 numbers were supported!.// if num is '1', returns 'a' // if num is >2, returns 'c' let result = match num { 1 => "a", 2 => "b", _ => "c", // anything other than 1 or 2 }You can match multiple values
let result = match num { 1 | 3 | 5 => "one three or five", _ => "something else" }