fn main() {
  three = 3
  two = 2

  calculateSimple = { in
    (50 + three) * two
  }

  calculateComplex = { in
    three + two + 50
  }

  multiply = { a, b in
    a * b
  }

  // calculates the result
  calculateSimpleResult = calculateSimple()
  calculateComplexResult = calculateComplex()
  multiplyResult = multiply(50, 50)

  list = [10, 20, 30]
  trueValue = true
  falseValue = false

  invert = { value in
    !value
  }

  notEqual = { a, b in
    a != b
  }

  equal = { a, b in
    a == b
  }

  results = [
    calculateSimpleResult,
    calculateComplexResult,
    multiplyResult,
    list,
    trueValue,
    falseValue,
    invert(true),
    invert(false),
    equal(5, 5),
    equal(5, 6),
    notEqual(5, 5),
    notEqual(5, 6)
  ]

  println("results:")
  println(results)
}