Web Reference: Jul 11, 2025 · The while and for loops are entry-controlled, meaning the condition is evaluated before executing the loop body. On the other hand, the do..while loop is exit-controlled, ensuring the loop body is executed at least once. 6,356 views • Apr 20, 2014 • Ruby Tutorial for Beginners, Ruby programming tutorials The Ruby while and until loops repeatedly execute a block of code based on a condition. In this tutorial, you’ll learn about the Ruby while and until loops with examples.
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