Ruby - Loops and Iteration
You want to sum all numbers in an array using an iterator instead of a loop. Which Ruby code correctly does this?
You want to sum all numbers in an array using an iterator instead of a loop. Which Ruby code correctly does this?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand summing with each
Initialize sum to 0, then add each element to sum inside the block.Step 2: Check each option
sum = 0 arr.each { |n| sum += n } puts sum correctly accumulates sum; others overwrite or misuse each.Final Answer:
sum = 0 arr.each { |n| sum += n } puts sum -> Option BQuick Check:
Sum with iterator = C [OK]
Quick Trick: Use sum += n inside each block to accumulate values [OK]
Common Mistakes:
- Overwriting sum instead of adding
- Misusing each return value
- Using for loop syntax incorrectly
Master "Loops and Iteration" in Ruby
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