Tasks are done

add_up.rb

@@ -0,0 +1,19 @@
+def add_up(i)
+    if (i.class !=Integer) || (i <1) 
+      puts "Please enter a positive integer"
+     else
+      sum = 0
+      loop do 
+        sum += i
+        i -= 1
+        if i == 0
+          break
+          end
+        end
+        puts sum
+        end
+      end
+
+      add_up(6)
+      add_up(-8)
+      add_up(5)

full_name.rb

@@ -0,0 +1,15 @@
+def Ask(question)
+    puts question
+    string = gets.chomp + " "
+    return string
+  end
+
+
+
+
+  full_name.push(Ask("Enter your first name, please"))
+   full_name.push(Ask("Enter your middle name, please"))
+  full_name.push(Ask("Enter your last name please"))
+
+  puts "Hello " + full_name[0] + full_name[1] + full_name[2] + "!"
+

leap_year.rb

@@ -0,0 +1,22 @@
+def is_leap(year)
+    if year %400 == 0
+      return true
+    elsif year % 100 == 0
+      return false
+    elsif year % 4 == 0
+        return true
+    else 
+      return false
+
+    end
+    end
+
+  year = begin_year
+  while year <= end_year do
+
+    if is_leap(year)
+    puts year  
+    end
+    year +=1
+    end
+

sorted_words.rb

@@ -0,0 +1,15 @@
+words = []
+
+while true do 
+  puts "Please enter a word. Type Enter to quit"
+  word = gets.chomp
+  if word == ''
+    break
+    elsif word.index(/[^A-Za-z]/)
+    puts "Not a word. Please try again"
+    else 
+    words.push(word)
+    end
+  end
+  words = words.sort
+  words.each {|word| puts word}