Programming simple simulations

The following code simulates the life cycle of a monarch butterfly.

stage ← "egg"
daysAsEgg ← 4
daysAsLarvae ← 12
daysAsPupa ← 12
daysAsAdult ← 36
daysInStage ← 0

REPEAT UNTIL (stage = "death") {
  IF (stage = "egg" AND daysInStage ≥ daysAsEgg) {
    stage ← "larvae"
    daysInStage ← 0
  }
  IF (stage = "larvae" AND daysInStage ≥ daysAsLarvae) {
    stage ← "pupa"
    daysInStage ← 0
  }
  IF (stage = "pupa" AND daysInStage ≥ daysAsPupa) {
    stage ← "adult"
    daysInStage ← 0
  }
  IF (stage = "adult" AND daysInStage ≥ daysAsAdult) {
    stage ← "death"
    daysInStage ← 0
  }
  daysInStage ← daysInStage + 1
  DISPLAY(lifeState)
}

Which details are excluded from this simulation?

👁️Note that there are 2 answers to this question.

(Choice A)
Monarch butterflies that migrate live longer than monarchs that do not.
(Choice B)
Some Monarch butterflies remain in larvae form for 8 days and others for 15 days.
(Choice C)
The Monarch butterfly spends more time as an adult than as a larvae.
(Choice D)
Monarch butterflies must go through the larvae stage before the pupa stage.

🤔

This code is written in pseudocode. You can't actually run pseudocode, but we use it for planning programs and for thinking about code independently of specific programming language.

AP CSP exam questions use pseudocode, so it's helpful to become familiar with it.

Here is a reference for the pseudocode used here:

a ← expression

Evaluates expression and assigns the result to the variable a.

DISPLAY (expression)

Displays the value of expression, followed by a space.

REPEAT UNTIL (condition)
{ 
    <instructions>
}

Executes the code in <instructions> until condition is true.

IF (<condition>) {
    <block of statements>
}

The code in block of statements is executed if the Boolean expression condition evaluates to true; no action is taken if condition evaluates to false.

**Arithmetic operators**
Operator	Meaning
`a + b`	Evaluates to the result of `b` added to `a`
`a - b`	Evaluates to the result of `b` subtracted from `a`
`a * b`	Evaluates to the result of `a` multiplied by `b`
`a / b`	Evaluates to the result of `a` divided by `b`

**Relational operators**
Operator	Meaning
`a = b`	Equality
`a ≠ b`	Inequality
`a > b`	Greater than
`a < b`	Less than
`a ≥ b`	Greater than or equal
`a ≤ b`	Less than or equal

AP®︎/College Computer Science Principles

Course: AP®︎/College Computer Science Principles > Unit 6

Problem