Ruby - Loops and Iteration
How can you use a
while loop to sum all numbers from 1 to 5 in Ruby? Choose the correct code.How can you use a while loop to sum all numbers from 1 to 5 in Ruby? Choose the correct code.
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Understand summing numbers 1 to 5
We add each number from 1 to 5 to sum.Step 2: Check loop conditions and sum updates
sum = 0 num = 1 while num <= 5 do sum += num num += 1 end puts sum correctly loops from 1 to 5 inclusive, adding each to sum. Others either exclude 5, start at 0, or overwrite sum incorrectly.Final Answer:
sum = 0 num = 1 while num <= 5 do sum += num num += 1 end puts sum -> Option BQuick Check:
Loop from 1 to 5 adding to sum [OK]
Quick Trick: Add inside loop and increment counter [OK]
Common Mistakes:
- Wrong loop range
- Starting at 0 instead of 1
- Overwriting sum instead of adding
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