Ruby - Variables and Data Types
You want to compute the average of two integers in Ruby and ensure the result is a float. Which code snippet correctly achieves this?
a = 10 b = 15 average = ?
You want to compute the average of two integers in Ruby and ensure the result is a float. Which code snippet correctly achieves this?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand integer division
Dividing two integers returns an integer in Ruby.Step 2: Convert sum to float before division
Converting the sum to float ensures float division.Step 3: Evaluate options
(a + b).to_f / 2 converts sum to float before dividing by 2, giving a float average. (a + b) / 2 returns integer division. a / 2 + b / 2 sums integer divisions, losing precision. (a.to_i + b.to_i) / 2.0 converts integers redundantly and divides by float, but sum is integer so result is float; however, converting sum first is clearer.Final Answer:
(a + b).to_f / 2 -> Option CQuick Check:
Convert sum to float before division [OK]
Quick Trick: Convert sum to float before dividing [OK]
Common Mistakes:
- Dividing integers directly causing integer division
- Converting individual numbers instead of sum
- Using integer division then converting result
Master "Variables and Data Types" in Ruby
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