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let bindings String interpolation Integers and floats Tuples Lists Booleans Case expressions Pipe operator

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Gleam / Practical Gleam

Result.try

Learn Result.try in Gleam with a focused explanation, a topic-specific example, and a mastery check.

12 min read • Intermediate

gleam-029.gleam

gleam

pub fn parse_positive(x: Int) { use _ <- result.try(case x > 0 { True -> Ok(x) False -> Error("not positive") }); Ok(x * 2) }

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Error propagation