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Solution: Calculate Average Score by Reading a File

Explore how to read data from a file in Ruby, convert string values to integers, and compute the average score safely using conditional checks. This lesson helps you practice file handling and data processing with hands-on coding techniques.

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Solution

Ruby 3.1.2
def cal_avg_score(file_name)

  file_content =  File.read(file_name)

  array = []

  

  file_content.split("\n").each do |line|

    array << line.to_i	

  end

  the_average = 0

  the_sum = array.inject{|sum,x| sum + x }

  the_average = the_sum * 1.0 / array.size if the_sum

  the_average = the_average.round(1) if the_average

  

  return the_average

end

  • Line 2: The code statement reads the contents of the file whose name is passed in the ...