student account generator array

studentaccountarray.rb

    #Assignment: Student Account Generator
    num_students = 5
    student_names = Array.new(num_students)
    student_ids = Array.new(num_students)
    student_emails = Array.new(num_students)
    puts "Please enter the names of  students when prompted."
    num_students.times do |i|
      puts "First Name: "
      first = gets.chomp
      puts "Last Name: "
      last = gets.chomp
      full_name = first.strip + " " + last.strip
      puts "Full Name is: " + full_name.upcase
      student_names[i] = full_name.upcase
    end
    num_students.times do |i|
      random_id = Random.new.rand(111111..999999)
      student_ids[i] = random_id
      puts student_ids[i]
    end
    num_students.times do |i|
      puts student_names[i]
      puts student_ids[i]
      first_initial = student_names[i][0]
      puts "first initial: " + first_initial
      names = student_names[i].split(" ")
      last_name = names[1]
      puts "last name: " + last_name
      id_digits = student_ids[i].digits
      puts "length: " + id_digits.length.to_s
      last_three_of_id = id_digits[-3..-1].join("")
      email = first_initial + last_name + last_three_of_id + 
    "@adadevelopersacademy.org"
      student_emails[i] = email
      puts "last 3: " + last_three_of_id 
      puts "e-mail: " + email
    end
    puts "Here is each student's information..."
    num_students.times do |i|
      puts "Full Name: " + student_names[i]
      puts "Student ID: " + student_ids[i].to_s
      puts "E-mail Address: " + student_emails[i]
    end

Good work! 👍
Out of curiosity: what are the pros and cons of organizing the code to have 3 loops back to back (starting on lines 7, 16 and 21), versus making it part of a single loop?