Backend Ruby Collections

add_up.rb

@@ -0,0 +1,15 @@
+#Write a program with a function add_up(i) . 
+def add_up(i)
+    sum = 0
+    for num in 1..i
+        sum += num
+    end
+    return sum
+end
+result1 = add_up(6)
+result2 = add_up(10)
+result3 = add_up(15)
+
+puts "the sum of 1 to 6 = #{result1}"
+puts "the sum of 1 to 10 = #{result2}"
+puts "the sum of 1 to 15 = #{result3}"

full_name.rb

@@ -0,0 +1,19 @@
+
+contact_list = []
+def ask (question, kind = "string")
+	print question + ""
+	answer = gets.chomp
+	answer = answer.to_i if kind == "number"
+	return answer
+end
+
+answer = ask ("what is your first name?")
+contact_list << answer
+answer = ask ("waht is your middle name?")
+contact_list << answer
+answer = ask ("what is your last name")
+contact_list << answer
+puts "Hello, #{contact_list.join('')}!"
+
+ contact_list = []
+

leap_year.rb

@@ -0,0 +1,16 @@
+def is_leap_year(year)
+    (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)
+  end
+
+  print "Enter starting year: "
+  start_year = gets.chomp.to_i
+
+  print "Enter ending year: "
+  end_year = gets.chomp.to_i
+
+  puts "Leap years between #{start_year} and #{end_year}:"
+
+  (start_year..end_year).each do |year|
+    puts year if is_leap_year(year)
+  end
+

sorted_out.rb

@@ -0,0 +1,22 @@
+#1 prompt user
+#2 gather input (string)
+#3 loop until blank word
+#4 sort array
+#5 print array 
+
+array = []
+input = "a"
+
+until input.empty?
+  puts "Add a word:"
+  input = gets.chomp
+  array << input unless input.empty?
+end
+
+sorted_array = array.sort
+
+puts "Sorted words:"
+sorted_array.each do |word|
+  puts word
+end
+