# String value
"hello world"
# Numeric value
42
# Boolean value
true
# Array value
[1, 2, 3, 4, 5]
# Hash value
{
"name" => "John",
"age" => 42,
"is_admin" => true
}
# Symbol value
:apple
# Range value
1..10
# Regular expression value
/\d+/
# Proc value
Proc.new { |x| x * x }
# Nil value
nil
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