A software developer writes 120 lines of code in the first hour. Each subsequent hour, she writes 10% fewer lines. How many total lines does she write in 4 hours?

Wed, 06 May 2026 12:11:45 +0000

**Why 120 Lines? The Surprising Math Behind Developer Productivity** Ever watched a skilled software developer write 120 lines of code in just the first hour—and wonder, *then what?* What happens in the next three hours? This pattern isn’t just impressive—it reflects real-world coding rhythms and beginner learning curves. Understanding how productivity slows with time reveals how coding efficiency scales and why mastering your own pace matters. In today’s fast-paced tech environment, where coding speed often gets measured, this simple math offers clarity—not just numbers, but insight into sustainable development. --- ### Why This Coding Pattern Is Gaining Attention