#### Example 1

```ruby
x = 10
puts x
puts y
```

#### Example 2

```ruby
x = 10
puts x
puts y
y = 20
```

#### Example 3

```ruby
x = 10
def say_hello
  puts "Hello World!"
end
puts x
```

#### Example 4

```ruby
def print_variable
  x = 4
  puts x
end

x = 2
print_variable
```

#### Example 5

```ruby
def print_variable
  x = 4
end

x = 2
print_variable
puts x
```