You have an array of words: words = ["I", "love", "Ruby"]. Which code correctly concatenates them into a single string with spaces using ?

hard📝 Application Q8 of 15

Ruby - String Operations

You have an array of words: words = ["I", "love", "Ruby"]. Which code correctly concatenates them into a single string with spaces using <<?

Asentence = ""; words.each { |w| sentence << w << " " }; sentence.strip!

Bsentence = words.join(" ")

Csentence = ""; words.each { |w| sentence + w + " " }

Dsentence = ""; words.each { |w| sentence << w }

Step-by-Step Solution

Solution:

Step 1: Understand how to append words with spaces
sentence = ""; words.each { |w| sentence << w << " " }; sentence.strip! appends each word and a space to the string, then removes trailing space.
Step 2: Compare other options
sentence = words.join(" ") uses join (not <<), sentence = ""; words.each { |w| sentence + w + " " } does not modify sentence, sentence = ""; words.each { |w| sentence << w } misses spaces.
Final Answer:
sentence = ""; words.each { |w| sentence << w << " " }; sentence.strip! -> Option A
Quick Check:
Use << inside loop and strip trailing space [OK]

Quick Trick: Use << in loop and strip trailing space [OK]

Common Mistakes:

MISTAKES

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