---
id: 67ee6321ca3ffb1590c00937
title: Task 12
challengeType: 22
dashedName: task-12
lang: en-US
---

<!-- (audio) Sophie: The for loop might not account for all the edge cases, which could lead to unexpected behavior. -->

# --instructions--

Listen to the audio and complete the sentence below.

# --fillInTheBlank--

## --sentence--

`The for loop might not account for all the BLANK, which could lead to BLANK.`

## --blanks--

`edge cases`

### --feedback--

This two-word phrase refers to rare or extreme situations that a program must handle correctly.

---

`unexpected behavior`

### --feedback--

This two-word phrase refers to results that the programmer did not intend or predict.

# --explanation--

An `edge case` is a rare or extreme situation that might cause problems in a program. For example:

`We need to test the app with edge cases to make sure it works in all situations.` - You need to test unusual situations to ensure the app is working properly.

`Unexpected behavior` happens when a program does something the programmer did not expect. For example:

`The app showed unexpected behavior when I tried to open it.` - The app didn't work as expected when you tried to open it.

# --scene--

```json
{
  "setup": {
    "background": "company2-center.png",
    "characters": [
      {
        "character": "Sophie",
        "position": {
          "x": 50,
          "y": 0,
          "z": 1.4
        },
        "opacity": 0
      }
    ],
    "audio": {
      "filename": "B1_17-1.mp3",
      "startTime": 1,
      "startTimestamp": 16.76,
      "finishTimestamp": 20.72
    }
  },
  "commands": [
    {
      "character": "Sophie",
      "opacity": 1,
      "startTime": 0
    },
    {
      "character": "Sophie",
      "startTime": 1,
      "finishTime": 4.96,
      "dialogue": {
        "text": "The for loop might not account for all the edge cases, which could lead to unexpected behavior.",
        "align": "center"
      }
    },
    {
      "character": "Sophie",
      "opacity": 0,
      "startTime": 5.46
    }
  ]
}
```
