Variables & Debugging

⏱ 40:00

Episode Summary

Writing clean, debuggable DAX with variables (VAR/RETURN). How variables evaluate once and cache results, plus debugging techniques for complex measures.

This is Episode 21 of the free Namaste Power BI course on DevWithData — covering variables & debugging. Watch the video above, then pass the MCQ checkpoint to unlock the next episode and update your Data Readiness Index score.

Key Takeaways

• →VAR captures a value or table once — computed in the context where defined
• →Variables improve readability, performance, and debuggability
• →Use variables to avoid repeating expensive calculations
• →RETURN can reference any previously defined variable