Conditionals and recursion
- 36. Jan is taller than Piet: comparison operators (1)
 - 37. Comparison operators (2)
 - 38. Logical operators
 - 39. Combining logical and comparison operators
 - 40. If it rains, I stay at home: conditional execution
 - 41. Conditional execution, example 1
 - 42. Conditional execution, example
 - 43. If it rains, I stay at home, else I go swimming: alternative
      execution
 - 44. Alternative execution, example
 - 45. Alternative execution, example
 - 46. If it rains, I stay at home, else if it is also hot I go
      swimming, else..: chained conditionals
 - 47. Chained conditionals, example
 - 48. Chained conditionals, example
 - 49. User intervention: keyboard input (1)
 - 50. User intervention: keyboard input (2)