Given the array nums = [0, 1, 2, 3], which code snippet correctly prints only the non-zero numbers using inline unless?

hard📝 Application Q15 of 15

Ruby - Control Flow

Given the array nums = [0, 1, 2, 3], which code snippet correctly prints only the non-zero numbers using inline unless?

Anums.each { |n| puts n if n != 0 }

Bnums.each { |n| puts n if n == 0 }

Cnums.each { |n| puts n unless n != 0 }

Dnums.each { |n| puts n unless n == 0 }

Step-by-Step Solution

Solution:

Step 1: Understand the goal
We want to print numbers except zero, so skip zero and print others.
Step 2: Analyze each option
nums.each { |n| puts n unless n == 0 } uses puts n unless n == 0, which prints n only if n is not zero. nums.each { |n| puts n if n == 0 } prints only zero, which is wrong. nums.each { |n| puts n unless n != 0 } prints only zero because unless n != 0 means if n == 0. nums.each { |n| puts n if n != 0 } prints non-zero numbers but uses inline if, not unless.
Final Answer:
nums.each { |n| puts n unless n == 0 } -> Option D
Quick Check:
Inline unless skips zero, prints others [OK]

Quick Trick: Use unless with condition to skip unwanted values [OK]

Common Mistakes:

MISTAKES

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