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Mojo Academy · Lesson

Constraints and Static Checks

Validate parameters before runtime.

Catching Mistakes Before Runtime

A constraint is a rule the compiler verifies about your parameters, stopping a bad build before the program ever runs. ⚙️

The constrained Function

Call constrained with a compile-time condition; if it is false, compilation fails with the message you supply.

fn half[n: Int]():
    constrained[n % 2 == 0, "n must be even"]()

All lessons in this course

  1. Parametric Algorithms
  2. Compile-Time Loop Unrolling
  3. Conditional Compilation
  4. Constraints and Static Checks
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