7 lines
1.3 KiB
HTML
7 lines
1.3 KiB
HTML
<!doctype html><html lang="en"><meta charset="utf-8"><title>Values and decisions</title><h1>Values and decisions</h1><p>15-minute session: read for 3 minutes, trace for 3, experiment for 7, and complete the check for 2. Spend longer whenever you need.</p><p>A decision chooses which statements run. The policy here is “ready at 80 or higher.” Trace 85, 79, 80, and 81 before running each case. The comparison includes 80. A program that prints the right answer for 85 may still be wrong at the boundary. Add a separate check rejecting scores below 0 or above 100; rejection and needing practice mean different things.</p><p><code>puts</code> prints a line. <code>def</code> and <code>end</code> delimit a method. <code>each</code> yields values to a block. An instance variable beginning with <code>@</code> belongs to an object; two objects can hold different values.</p><pre><code class="language-ruby">score = 85
|
|
if score >= 80
|
|
puts "Ready"
|
|
else
|
|
puts "Practice"
|
|
end
|
|
</code></pre><p><strong>Expected result:</strong> <code>Ready</code></p><h3>Practice and evidence</h3><p>Keep three notes: your prediction, the actual result, and why they match or differ. The completion check grades understanding; the practice task builds skill.</p><p><a href="https://www.ruby-lang.org/en/documentation/">Language reference</a></p></html> |