Write a method that calculates the area of a rectangle given its length and width. The method should return the area as a Decimal value.

Handle edge cases appropriately: return null for null inputs, and return 0 for zero or negative values.

Examples:

Decimal area = calculateRectangleArea(5.0, 3.0);
// Returns: 15.0

Decimal zeroArea = calculateRectangleArea(0.0, 5.0);
// Returns: 0.0

Decimal nullArea = calculateRectangleArea(null, 5.0);
// Returns: null
Apex Code Editor
Sign in to Submit

Welcome to Lightning Challenge!

Create an Account

Sign up to track your progress, earn points, and compete with others. Your solutions will be saved automatically.

Create account

How It Works

  • • Write your solution in the code editor
  • • Connect your Salesforce org to test
  • • Submit to check if your solution passes
  • • Use hints if you get stuck

Contest Alert

🏆 #CodeEveryDay May 2026

Contest runs May 1 - 31. Complete challenges to climb the leaderboard!

Only the 31 daily challenges shown during this contest count toward points. Earlier dailies don't carry over.

Wally can't hear you

Please sign in to access the AI Assistant

Sign In