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Ada / Subprograms

pre post aspects

Learn pre post aspects in Ada with a construct-specific explanation, unique example, engineering boundary, and mastery check.

10 min read • Intermediate

pre post aspects is a focused Ada topic inside Subprograms. This lesson explains the construct itself, the state or value it operates on, and the observable result it produces.

Read the example as a small executable experiment. Identify the exact syntax that belongs to pre post aspects, then change one input and predict the result before running it.

Topic-specific example

ada-04-10-pre-post-aspects.adb
ada Try It Live 
function Sqrt_Pos(X:Float) return Float with Pre => X>=0.0, Post => Sqrt_Pos'Result>=0.0;
Edge case / engineering note

pre post aspects has rules that are easy to miss when the example is copied mechanically. Check the feature-specific boundary shown by this construct: scope, mutability, evaluation order, type constraints, lifetime, error behavior, compile-time restrictions, or resource cleanup where applicable.

Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

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